Windows 11, version 26H1 August 27, 2026—KB5120996 (OS Build 28000.2804) Preview August 11, 2026—KB5121000 (OS Build 28000.2704) July 28, 2026—KB5101681 (OS Build 28000.2608) Preview July 14, 2026—KB5101649 (OS Build 28000.2525) June 23, 2026—KB5095091 (OS Build 28000.2340) Preview June 9, 2026—KB5095051 (OS Build 28000.2269) May 26, 2026—KB5089570 (OS Build 28000.2179) Preview May 12, 2026—KB5089548 (OS Build 28000.2113) April 30, 2026—KB5083806 (OS Build 28000.1896) Preview April 14, 2026—KB5083768 (OS Build 28000.1836) March 26, 2026—KB5079489 (OS Build 28000.1764) Preview March 10, 2026—KB5079466 (OS Build 28000.1719) February 24, 2026—KB5077239 (OS Build 28000.1643) Preview February 10, 2026—KB5077179 (OS Build 28000.1575) Windows 11, version 25H2 August 27, 2026—KB5120998 (OS Builds 26200.9278 and 26100.9278) Preview August 11, 2026—KB5121003 (OS Builds 26200.9168 and 26100.9168) July 28, 2026—KB5101684 (OS Builds 26200.8973 and 26100.8973) Preview July 18, 2026—KB5121767 (OS Builds 26200.8894 and 26100.8894) Out-of-band July 14, 2026—KB5101650 (OS Builds 26200.8875 and 26100.8875) June 23, 2026—KB5095093 (OS Builds 26200.8737 and 26100.8737) Preview June 9, 2026—KB5094126 (OS Builds 26200.8655 and 26100.8655) May 26, 2026—KB5089573 (OS Builds 26200.8524 and 26100.8524) Preview May 12, 2026—KB5089549 (OS Builds 26200.8457 and 26100.8457) April 30, 2026—KB5083631 (OS Builds 26200.8328 and 26100.8328) Preview April 14, 2026—KB5083769 (OS Builds 26200.8246 and 26100.8246) March 31, 2026—KB5086672 (OS Builds 26200.8117 and 26100.8117) Out-of-band March 26, 2026—KB5079391 (OS Builds 26200.8116 and 26100.8116) Preview March 21, 2026—KB5085516 (OS Builds 26200.8039 and 26100.8039) Out-of-band March 10, 2026—KB5079473 (OS Builds 26200.8037 and 26100.8037) February 24, 2026—KB5077241 (OS Builds 26200.7922 and 26100.7922) Preview February 10, 2026—KB5077181 (OS Builds 26200.7840 and 26100.7840) January 29, 2026—KB5074105 (OS Builds 26200.7705 and 26100.7705) Preview January 24, 2026—KB5078127 (OS Builds 26200.7628 and 26100.7628) Out-of-band January 17, 2026—KB5077744 (OS Builds 26200.7627 and 26100.7627) Out-of-band January 13, 2026—KB5074109 (OS Builds 26200.7623 and 26100.7623) December 9, 2025—KB5072033 (OS Builds 26200.7462 and 26100.7462) December 1, 2025—KB5070311 (OS Builds 26200.7309 and 26100.7309) Preview November 11, 2025—KB5068861 (OS Builds 26200.7171 and 26100.7171) October 28, 2025—KB5067036 (OS Builds 26200.7019 and 26100.7019) Preview October 20, 2025—KB5070773 (OS Builds 26200.6901 and 26100.6901) Out-of-band October 14, 2025—KB5066835 (OS Builds 26200.6899 and 26100.6899) September 29, 2025—KB5065789 (OS Build 26100.6725) Preview Windows 11, version 24H2 August 27, 2026—KB5120998 (OS Builds 26200.9278 and 26100.9278) Preview August 11, 2026—KB5121003 (OS Builds 26200.9168 and 26100.9168) July 28, 2026—KB5101684 (OS Builds 26200.8973 and 26100.8973) Preview July 18, 2026—KB5121767 (OS Builds 26200.8894 and 26100.8894) Out-of-band July 14, 2026—KB5101650 (OS Builds 26200.8875 and 26100.8875) June 23, 2026—KB5095093 (OS Builds 26200.8737 and 26100.8737) Preview June 9, 2026—KB5094126 (OS Builds 26200.8655 and 26100.8655) May 26, 2026—KB5089573 (OS Builds 26200.8524 and 26100.8524) Preview May 12, 2026—KB5089549 (OS Builds 26200.8457 and 26100.8457) April 30, 2026—KB5083631 (OS Builds 26200.8328 and 26100.8328) Preview April 14, 2026—KB5083769 (OS Builds 26200.8246 and 26100.8246) March 31, 2026—KB5086672 (OS Builds 26200.8117 and 26100.8117) Out-of-band March 26, 2026—KB5079391 (OS Builds 26200.8116 and 26100.8116) Preview March 21, 2026—KB5085516 (OS Builds 26200.8039 and 26100.8039) Out-of-band March 10, 2026—KB5079473 (OS Builds 26200.8037 and 26100.8037) February 24, 2026—KB5077241 (OS Builds 26200.7922 and 26100.7922) Preview February 10, 2026—KB5077181 (OS Builds 26200.7840 and 26100.7840) January 29, 2026—KB5074105 (OS Builds 26200.7705 and 26100.7705) Preview January 24, 2026—KB5078127 (OS Builds 26200.7628 and 26100.7628) Out-of-band January 17, 2026—KB5077744 (OS Builds 26200.7627 and 26100.7627) Out-of-band January 13, 2026—KB5074109 (OS Builds 26200.7623 and 26100.7623) December 9, 2025—KB5072033 (OS Builds 26200.7462 and 26100.7462) December 1, 2025—KB5070311 (OS Builds 26200.7309 and 26100.7309) Preview November 11, 2025—KB5068861 (OS Builds 26200.7171 and 26100.7171) October 28, 2025—KB5067036 (OS Builds 26200.7019 and 26100.7019) Preview October 20, 2025—KB5070773 (OS Builds 26200.6901 and 26100.6901) Out-of-band October 14, 2025—KB5066835 (OS Builds 26200.6899 and 26100.6899) September 29, 2025—KB5065789 (OS Build 26100.6725) Preview September 22, 2025—KB5068221 (OS Build 26100.6588) Out-of-band September 9, 2025—KB5065426 (OS Build 26100.6584) August 29, 2025—KB5064081 (OS Build 26100.5074) Preview August 12, 2025—KB5063878 (OS Build 26100.4946) July 22, 2025—KB5062660 (OS Build 26100.4770) Preview July 13, 2025—KB5064489 (OS Build 26100.4656) Out-of-band July 8, 2025—KB5062553 (OS Build 26100.4652) June 26, 2025—KB5060829 (OS Build 26100.4484) Preview June 11, 2025—KB5063060 (OS Build 26100.4351) Out-of-band June 10, 2025—KB5060842 (OS Build 26100.4349) May 28, 2025—KB5058499 (OS Build 26100.4202) Preview May 27, 2025—KB5061977 (OS Build 26100.4066) Out-of-band May 13, 2025—KB5058411 (OS Build 26100.4061) April 25, 2025—KB5055627(OS Build 26100.3915) Preview April 8, 2025—KB5055523 (OS Build 26100.3775) March 27, 2025—KB5053656 (OS Build 26100.3624) Preview March 11, 2025—KB5053598 (OS Build 26100.3476) February 25, 2025—KB5052093 (OS Build 26100.3323) Preview February 11, 2025—KB5051987 (OS Build 26100.3194) January 28, 2025—KB5050094 (OS Build 26100.3037) Preview January 14, 2025—KB5050009 (OS Build 26100.2894) December 10, 2024—KB5048667 (OS Build 26100.2605) November 21, 2024—KB5046740 (OS Build 26100.2454) Preview November 12, 2024—KB5046617 (OS Build 26100.2314) October 24, 2024—KB5044384 (OS Build 26100.2161) Preview October 8, 2024—KB5044284 (OS Build 26100.2033) September 30, 2024—KB5043178 (OS Build 26100.1882) Preview September 10, 2024—KB5043080 (OS Build 26100.1742) August 27, 2024—KB5041865 (OS Build 26100.1591) Preview August 13, 2024—KB5041571 (OS Build 26100.1457) July 30, 2024—KB5040529 (OS Build 26100.1301) Preview July 9, 2024—KB5040435 (OS Build 26100.1150) June 28, 2024—KB5039304 (OS Build 26100.1000) Preview June 15, 2024—KB5039239 (OS Build 26100.863) Windows 11, version 23H2 August 11, 2026—KB5120240 (OS Build 22631.7517) July 14, 2026—KB5099414 (OS Build 22631.7376) June 9, 2026—KB5093998 (OS Build 22631.7219) May 12, 2026—KB5087420 (OS Build 22631.7079) April 14, 2026—KB5082052 (OS Build 22631.6936) March 10, 2026—KB5078883 (OS Build 22631.6783) February 10, 2026—KB5075941 (OS Build 22631.6649) January 24, 2026—KB5078132 (OS Build 22631.6495) Out-of-band January 17, 2026—KB5077797 (OS Build 22631.6494) Out-of-band January 13, 2026—KB5073455 (OS Build 22631.6491) December 9, 2025—KB5071417 (OS Build 22631.6345) November 20, 2025—KB5070312 (OS Build 22631.6276) Preview November 11, 2025—KB5068865 (OS Build 22631.6199) October 28, 2025—KB5067112 (OS Build 22631.6133) Preview October 14, 2025—KB5066793 (OS Builds 22621.6060 and 22631.6060) September 23, 2025—KB5065790 (OS Build 22631.5984) Preview September 9, 2025—KB5065431 (OS Builds 22621.5909 and 22631.5909) August 26, 2025—KB5064080 (OS Build 22631.5840) Preview August 19, 2025—KB5066189 (OS Builds 22621.5771 and 22631.5771) Out-of-band August 12, 2025—KB5063875 (OS Builds 22621.5768 and 22631.5768) July 22, 2025—KB5062663 (OS Builds 22631.5699) Preview July 8, 2025—KB5062552 (OS Builds 22621.5624 and 22631.5624) June 26, 2025—KB5060826 (OS Builds 22621.5549 and 22631.5549) Preview June 10, 2025—KB5060999 (OS Builds 22621.5472 and 22631.5472) May 31, 2025—KB5062170 (OS Builds 22621.5415 and 22631.5415) Out-of-band May 27, 2025—KB5058502 (OS Builds 22621.5413 and 22631.5413) Preview May 13, 2025—KB5058405 (OS Builds 22621.5335 and 22631.5335) April 22, 2025—KB5055629 (OS Builds 22621.5262 and 22631.5262) Preview April 11, 2025—KB5058919 (OS Builds 22621.5192 and 22631.5192) Out-of-band April 8, 2025—KB5055528 (OS Builds 22621.5189 and 22631.5189) March 25, 2025—KB5053657 (OS Builds 22621.5126 and 22631.5126) Preview March 11, 2025—KB5053602 (OS Builds 22621.5039 and 22631.5039) February 25, 2025—KB5052094 (OS Builds 22621.4974 and 22631.4974) Preview February 11, 2025—KB5051989 (OS Builds 22621.4890 and 22631.4890) January 29, 2025—KB5050092 (OS Builds 22621.4830 and 22631.4830) Preview January 14, 2025—KB5050021 (OS Builds 22621.4751 and 22631.4751) December 10, 2024—KB5048685 (OS Builds 22621.4602 and 22631.4602) November 21, 2024—KB5046732 (OS Builds 22621.4541 and 22631.4541) Preview November 12, 2024—KB5046633 (OS Builds 22621.4460 and 22631.4460) October 22, 2024—KB5044380 (OS Builds 22621.4391 and 22631.4391) Preview October 8, 2024—KB5044285 (OS Builds 22621.4317 and 22631.4317) September 26, 2024—KB5043145 (OS Builds 22621.4249 and 22631.4249) Preview September 10, 2024—KB5043076 (OS Builds 22621.4169 and 22631.4169) August 27, 2024—KB5041587 (OS Builds 22621.4112 and 22631.4112) Preview August 13, 2024—KB5041585 (OS Builds 22621.4037 and 22631.4037) July 25, 2024—KB5040527 (OS Builds 22621.3958 and 22631.3958) Preview July 9, 2024—KB5040442 (OS Builds 22621.3880 and 22631.3880) June 25, 2024—KB5039302 (OS Builds 22621.3810 and 22631.3810) Preview June 11, 2024—KB5039212 (OS Builds 22621.3737 and 22631.3737) May 29, 2024—KB5037853 (OS Builds 22621.3672 and 22631.3672) Preview May 14, 2024—KB5037771 (OS Builds 22621.3593 and 22631.3593) April 23, 2024—KB5036980 (OS Builds 22621.3527 and 22631.3527) Preview April 9, 2024—KB5036893 (OS Builds 22621.3447 and 22631.3447) March 26, 2024—KB5035942 (OS Builds 22621.3374 and 22631.3374) Preview March 12, 2024—KB5035853 (OS Builds 22621.3296 and 22631.3296) February 29, 2024—KB5034848 (OS Builds 22621.3235 and 22631.3235) Preview February 13, 2024—KB5034765 (OS Builds 22621.3155 and 22631.3155) January 23, 2024—KB5034204 (OS Builds 22621.3085 and 22631.3085) Preview January 9, 2024—KB5034123 (OS Builds 22621.3007 and 22631.3007) December 12, 2023—KB5033375 (OS Builds 22621.2861 and 22631.2861) December 4, 2023—KB5032288 (OS Builds 22621.2792 and 22631.2792) Preview November 14, 2023—KB5032190 (OS Builds 22621.2715 and 22631.2715) October 31, 2023—KB5031455 (OS Builds 22621.2506 and 22631.2506) Preview Windows 11, version 22H2 End of servicing statement October 14, 2025—KB5066793 (OS Builds 22621.6060 and 22631.6060) September 9, 2025—KB5065431 (OS Builds 22621.5909 and 22631.5909) August 19, 2025—KB5066189 (OS Builds 22621.5771 and 22631.5771) Out-of-band August 12, 2025—KB5063875 (OS Builds 22621.5768 and 22631.5768) July 22, 2025—KB5062663 (OS Builds 22621.5699) Preview July 8, 2025—KB5062552 (OS Builds 22621.5624 and 22631.5624) June 26, 2025—KB5060826 (OS Builds 22621.5549 and 22631.5549) Preview June 10, 2025—KB5060999 (OS Builds OS 22621.5472 and 22631.5472) May 31, 2025—KB5062170 (OS Builds 22621.5415 and 22631.5415) Out-of-band May 27, 2025—KB5058502 (OS Builds 22621.5413 and 22631.5413) Preview May 13, 2025—KB5058405 (OS Builds 22621.5335 and 22631.5335) April 22, 2025—KB5055629 (OS Builds 22621.5262 and 22631.5262) Preview April 11, 2025—KB5058919 (OS Builds 22621.5192 and 22631.5192) Out-of-band April 8, 2025—KB5055528 (OS Builds 22621.5191 and 22631.5191) March 25, 2025—KB5053657 (OS Builds 22621.5126 and 22631.5126) Preview March 11, 2025—KB5053602 (OS Builds 22621.5039 and 22631.5039) February 25, 2025—KB5052094 (OS Builds 22621.4974 and 22631.4974) Preview February 11, 2025—KB5051989 (OS Builds 22621.4890 and 22631.4890) January 29, 2025—KB5050092 (OS Builds 22621.4830 and 22631.4830) Preview January 14, 2025—KB5050021 (OS Builds 22621.4751 and 22631.4751) December 10, 2024—KB5048685 (OS Builds 22621.4602 and 22631.4602) November 21, 2024—KB5046732 (OS Builds 22621.4541 and 22631.4541) Preview November 12, 2024—KB5046633 (OS Builds 22621.4460 and 22631.4460) October 22, 2024—KB5044380 (OS Builds 22621.4391 and 22631.4391) Preview October 8, 2024—KB5044285 (OS Builds 22621.4317 and 22631.4317) September 26, 2024—KB5043145 (OS Builds 22621.4249 and 22631.4249) Preview September 10, 2024—KB5043076 (OS Builds 22621.4169 and 22631.4169) August 27, 2024—KB5041587 (OS Builds 22621.4112 and 22631.4112) Preview August 13, 2024—KB5041585 (OS Builds 22621.4037 and 22631.4037) July 25, 2024—KB5040527 (OS Builds 22621.3958 and 22631.3958) Preview July 9, 2024—KB5040442 (OS Builds 22621.3880 and 22631.3880) June 25, 2024—KB5039302 (OS Builds 22621.3810 and 22631.3810) Preview June 11, 2024—KB5039212 (OS Builds 22621.3737 and 22631.3737)

May 29, 2024—KB5037853 (OS Builds 22621.3672 and 22631.3672) Preview May 14, 2024—KB5037771 (OS Builds 22621.3593 and 22631.3593) April 23, 2024—KB5036980 (OS Builds 22621.3527 and 22631.3527) Preview April 9, 2024—KB5036893 (OS Builds 22621.3447 and 22631.3447) March 26, 2024—KB5035942 (OS Builds 22621.3374 and 22631.3374) Preview March 12, 2024—KB5035853 (OS Builds 22621.3296 and 22631.3296) February 29, 2024—KB5034848 (OS Builds 22621.3235 and 22631.3235) Preview February 13, 2024—KB5034765 (OS Builds 22621.3155 and 22631.3155) January 23, 2024—KB5034204 (OS Builds 22621.3085 and 22631.3085) Preview January 9, 2024—KB5034123 (OS Builds 22621.3007 and 22631.3007) December 12, 2023—KB5033375 (OS Builds 22621.2861 and 22631.2861) December 4, 2023—KB5032288 (OS Builds 22621.2792 and 22631.2792) Preview November 14, 2023—KB5032190 (OS Builds 22621.2715 and 22631.2715) October 31, 2023—KB5031455 (OS Builds 22621.2506 and 22631.2506) Preview October 10, 2023—KB5031354 (OS Build 22621.2428) September 26, 2023—KB5030310 (OS Build 22621.2361) Preview September 12, 2023—KB5030219 (OS Build 22621.2283) August 22, 2023—KB5029351 (OS Build 22621.2215) Preview August 8, 2023—KB5029263 (OS Build 22621.2134) July 26, 2023—KB5028254 (OS Build 22621.2070) Preview July 11, 2023—KB5028185 (OS Build 22621.1992) June 27, 2023—KB5027303 (OS Build 22621.1928) Preview June 13, 2023—KB5027231 (OS Build 22621.1848) May 24, 2023—KB5026446 (OS Build 22621.1778) Preview May 9, 2023—KB5026372 (OS Build 22621.1702) April 25, 2023—KB5025305 (OS Build 22621.1635) Preview April 11, 2023—KB5025239 (OS Build 22621.1555) March 28, 2023—KB5023778 (OS Build 22621.1485) Preview March 14, 2023—KB5023706 (OS Build 22621.1413) February 28, 2023—KB5022913 (OS Build 22621.1344) Preview February 14, 2023—KB5022845 (OS Build 22621.1265) January 26, 2023—KB5022360 (OS Build 22621.1194) Preview January 10, 2023—KB5022303 (OS Build 22621.1105) December 13, 2022—KB5021255 (OS Build 22621.963) November 29, 2022—KB5020044 (OS Build 22621.900) Preview November 8, 2022—KB5019980 (OS Build 22621.819) October 25, 2022—KB5018496 (OS Build 22621.755) Preview October 18, 2022—KB5019509 (OS Build 22621.675) Out-of-band October 11, 2022—KB5018427 (OS Build 22621.674) September 30, 2022—KB5017389 (OS Build 22621.608) Preview Windows 11, version 21H2 October 8, 2024—KB5044280 (OS Build 22000.3260) September 10, 2024—KB5043067 (OS Build 22000.3197) August 13, 2024—KB5041592 (OS Build 22000.3147) July 9, 2024—KB5040431 (OS Build 22000.3079) June 11, 2024—KB5039213 (OS Build 22000.3019) May 14, 2024—KB5037770 (OS Build 22000.2960) April 9, 2024—KB5036894 (OS Build 22000.2899) March 12, 2024—KB5035854 (OS Build 22000.2836) February 13, 2024—KB5034766 (OS Build 22000.2777) January 9, 2024—KB5034121 (OS Build 22000.2713) December 12, 2023—KB5033369 (OS Build 22000.2652) November 14, 2023—KB5032192 (OS Build 22000.2600) October 10, 2023—KB5031358 (OS Build 22000.2538) September 26, 2023—KB5030301 (OS Build 22000.2482) Preview September 12, 2023—KB5030217 (OS Build 22000.2416) August 22, 2023—KB5029332 (OS Build 22000.2360) Preview August 8, 2023—KB5029253 (OS Build 22000.2295) July 25, 2023—KB5028245 (OS Build 22000.2245) Preview July 11, 2023—KB5028182 (OS Build 22000.2176) June 28, 2023—KB5027292 (OS Build 22000.2124) Preview June 13, 2023—KB5027223 (OS Build 22000.2057) May 23, 2023—KB5026436 (OS Build 22000.2003) Preview May 9, 2023—KB5026368 (OS Build 22000.1936) April 25, 2023—KB5025298 (OS Build 22000.1880) Preview April 11, 2023—KB5025224 (OS Build 22000.1817) March 28, 2023—KB5023774 (OS Build 22000.1761) Preview March 14, 2023—KB5023698 (OS Build 22000.1696) February 21, 2023—KB5022905 (OS Build 22000.1641) Preview February 14, 2023—KB5022836 (OS Build 22000.1574) January 19, 2023—KB5019274 (OS Build 22000.1516) Preview January 10, 2023—KB5022287 (OS Build 22000.1455) December 13, 2022—KB5021234 (OS Build 22000.1335) November 15, 2022—KB5019157 (OS Build 22000.1281) Preview November 8, 2022—KB5019961 (OS Build 22000.1219) October 25, 2022—KB5018483 (OS Build 22000.1165) Preview October 17, 2022—KB5020387 (OS Build 22000.1100) Out-of-band October 11, 2022—KB5018418 (OS Build 22000.1098) September 20, 2022—KB5017383 (OS Build 22000.1042) Preview September 13, 2022—KB5017328 (OS Build 22000.978) August 25, 2022—KB5016691 (OS Build 22000.918) Preview August 9, 2022—KB5016629 (OS Build 22000.856) July 21, 2022—KB5015882 (OS Build 22000.832) Preview July 12, 2022—KB5015814 (OS Build 22000.795) June 23, 2022—KB5014668 (OS Build 22000.778) Preview June 20, 2022—KB5016138 (OS Build 22000.740) Out-of-band June 14, 2022—KB5014697 (OS Build 22000.739) May 24, 2022—KB5014019 (OS Build 22000.708) Preview May 10, 2022—KB5013943 (OS Build 22000.675) April 25, 2022—KB5012643 (OS Build 22000.652) Preview April 12, 2022—KB5012592 (OS Build 22000.613) March 28, 2022—KB5011563 (OS Build 22000.593) Preview March 8, 2022—KB5011493 (OS Build 22000.556) February 15, 2022—KB5010414 (OS Build 22000.527) Preview February 8, 2022—KB5010386 (OS Build 22000.493) January 25, 2022—KB5008353 (OS Build 22000.469) Preview January 17, 2022—KB5010795 (OS Build 22000.438) Out-of-band January 11, 2022—KB5009566 (OS Build 22000.434) December 14, 2021—KB5008215 (OS Build 22000.376) November 22, 2021—KB5007262 (OS Build 22000.348) Preview November 9, 2021—KB5007215 (OS Build 22000.318) October 21, 2021—KB5006746 (OS Build 22000.282) Preview October 12, 2021—KB5006674 (OS Build 22000.258) This cumulative update for Windows 11, version 25H2 and 24H2 (KB5083769), includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained . For information on Windows update terminology, see the different types of Windows software updates . To view the latest updates about this release, visit the Windows release health dashboard or the update history page for Windows 11, version 25H2 and 24H2 . Announcements and messages This section provides key notifications related to this release, including announcements, change logs, and end-of-support notices. Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the past months. Devices that haven’t received the newer certificates will continue to start and operate normally , and standard Windows updates will continue to install. We will continue to install the newer certificates via Windows updates in the coming months. You can check your PC status on the Windows Security app . If you are an IT administrator, follow the guidance on the Secure Boot Playbook for Windows clients and Windows Server. Known issue added: "Warnings related to Remote Desktop might not display correctly" Update: Instructions under Catalog ( How to get this update > Catalog ) are updated. This security update contains fixes and quality improvements from KB5079473 (released March 10, 2026), KB5085516 (released March 21, 2026), KB5079391 (released March 26, 2026 - no longer offered), and KB5086672 (released March 31, 2026). The following summary outlines key issues addressed by this update. Also, included are available new features. The bold text within the brackets indicates the item or area of the change. [Secure Boot] New! The status of Secure Boot certificate updates on your device may be displayed in the Windows Security app (Settings > Privacy & security > Windows Security). Learn more about the status alerts via badges and notifications. These enhancements are disabled by default on commercial devices. With this update, Windows quality updates include additional high confidence device targeting data, increasing coverage of devices eligible to automatically receive new Secure Boot certificates. Devices receive the new certificates only after demonstrating sufficient successful update signals, maintaining a controlled and phased rollout. This update addresses an issue where the device might enter BitLocker Recovery after the Secure Boot updates. New! The status of Secure Boot certificate updates on your device may be displayed in the Windows Security app (Settings > Privacy & security > Windows Security). Learn more about the status alerts via badges and notifications. These enhancements are disabled by default on commercial devices. With this update, Windows quality updates include additional high confidence device targeting data, increasing coverage of devices eligible to automatically receive new Secure Boot certificates. Devices receive the new certificates only after demonstrating sufficient successful update signals, maintaining a controlled and phased rollout. This update addresses an issue where the device might enter BitLocker Recovery after the Secure Boot updates. [Networking] This update improves reliability when Windows uses SMB compression over QUIC. After you install this update, SMB compression requests over QUIC complete more consistently, reducing the likelihood of timeouts and supporting smoother, more dependable performance. [Networking] This update improves reliability when Windows uses SMB compression over QUIC. After you install this update, SMB compression requests over QUIC complete more consistently, reducing the likelihood of timeouts and supporting smoother, more dependable performance. [Remote Desktop] This update improves protection against phishing attacks that use Remote Desktop (.rdp) files. When you open an .rdp file, Remote Desktop shows all requested connection settings before it connects, with each setting turned off by default. A one-time security warning also appears the first time you open an .rdp file on a device. For more information, see Understanding security warnings when opening Remote Desktop (RDP) files . [Remote Desktop] This update improves protection against phishing attacks that use Remote Desktop (.rdp) files. When you open an .rdp file, Remote Desktop shows all requested connection settings before it connects, with each setting turned off by default. A one-time security warning also appears the first time you open an .rdp file on a device. For more information, see Understanding security warnings when opening Remote Desktop (RDP) files . [Reset this PC (known issue)] Fixed: This update addresses an issue that might cause device reset to fail when using the “Keep my files” or “Remove everything” options. This might occur after installing the March 2026 ( KB5079420 ) Hotpatch security update. [Reset this PC (known issue)] Fixed: This update addresses an issue that might cause device reset to fail when using the “Keep my files” or “Remove everything” options. This might occur after installing the March 2026 ( KB5079420 ) Hotpatch security update. [Vulnerable driver blocklist] This update introduces a security hardening change that adds known vulnerable kernel drivers to the Microsoft vulnerable driver blocklist. Backup applications that rely on blocked drivers might experience failures when attempting to mount or manage disk images. These apps relying on blocked drivers might display error messages, including "The backup has failed because Microsoft VSS has timed out during the snapshot creation" or VSS_E_BAD_STATE. Affected users should update to a newer version of their application that uses newer drivers that include the required protections. For more information, see April 2026 Windows security updates introduce protections to known vulnerable kernel drivers. [Vulnerable driver blocklist] This update introduces a security hardening change that adds known vulnerable kernel drivers to the Microsoft vulnerable driver blocklist. Backup applications that rely on blocked drivers might experience failures when attempting to mount or manage disk images. These apps relying on blocked drivers might display error messages, including "The backup has failed because Microsoft VSS has timed out during the snapshot creation" or VSS_E_BAD_STATE. Affected users should update to a newer version of their application that uses newer drivers that include the required protections. For more information, see April 2026 Windows security updates introduce protections to known vulnerable kernel drivers. If you've already installed previous updates, your device will download and install only the new updates included in this package. For more information about security vulnerabilities, see the Security Update Guide and the April 2026 Security Updates . This release updates the following AI components: Windows 11 servicing stack update (KB5088467)- 26100.8247 This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates. To learn more about SSUs, see Simplifying on-premises deployment of servicing stack updates . Known issues in this update Some devices with an unrecommended BitLocker Group Policy configuration might be required to enter their BitLocker recovery key on the first restart after installing this update. This issue only affects a limited number of systems in which ALL of the following conditions are true. These conditions are unlikely to be found on personal devices not managed by IT departments. BitLocker is enabled on the OS drive. The Group Policy " Configure TPM platform validation profile for native UEFI firmware configurations " is configured, and PCR7 is included in the validation profile (or the equivalent registry key is set manually). System Information ( msinfo32.exe ) reports Secure Boot State PCR7 Binding as " Not Possible ". The Windows UEFI CA 2023 certificate is present in the device’s Secure Boot Signature Database (DB), making the device eligible for the 2023‑signed Windows Boot Manager to be made the default. The device is not already running the 2023-signed Windows Boot Manager. In this scenario, the BitLocker recovery key only needs to be entered once -- subsequent restarts will not trigger a BitLocker recovery screen, as long as the group policy configuration remains unchanged. For help finding your BitLocker recovery key, see the article, Find your BitLocker recovery key . Enterprises are recommended to audit their BitLocker group policies for explicit PCR7 inclusion and check msinfo32.exe for their PCR7 binding status before installing this update. (See the Workaround below.) This issue is addressed in KB5089549 . After installing KB5089549, devices with this incompatible group policy configuration are prevented from installing the 2023-signed Windows Boot Manager. If your device was impacted, Event ID 1032 will appear in the System event log when installing Windows updates: "The Secure Boot update Boot Manager (2023) was not applied due to a known incompatibility with the current BitLocker configuration." If you receive Event ID 1032 , Microsoft strongly recommends removing the Group Policy configuration before installing updates so that you can install the 2023-signed Windows Boot Manager and continue to receive the latest Secure Boot protections. Remove the Group Policy configuration before installing the update (Recommended) Open Group Policy Editor ( gpedit.msc ) or your Group Policy Management Console. Navigate to: Computer Configuration > Administrative Templates > Windows Components > BitLocker Drive Encryption > Operating System Drives . Set " Configure TPM platform validation profile for native UEFI firmware configurations " to " Not Configured ". Run the following command on affected devices to propagate the policy change: gpupdate /force Run the following command to suspend BitLocker (if BitLocker is enabled on the C: drive): manage-bde -protectors -disable C: Run the following command to resume BitLocker (if BitLocker is enabled on the C: drive): manage-bde -protectors -enable C: This updates the BitLocker bindings to use the Windows-selected default PCR profile. If you do not wish to remove this Group Policy configuration, you can install the new Windows Boot Manager by temporarily suspending BitLocker and installing the Secure Boot update. To do this: Run the following command to suspend BitLocker (if BitLocker is enabled on the C: drive): manage-bde -protectors -disable C: Run the following command: Start-ScheduledTask -TaskName "\Microsoft\Windows\PI\Secure-Boot-Update" Restart the device. Once the new Windows Boot Manager is successfully installed, enable BitLocker by running the command: manage-bde -protectors -enable C: After installing this update, the security warning that appears when opening Remote Desktop (RDP) files might not display correctly in some cases. This issue might occur when you use more than one monitor with different display scaling settings (for example, one display set to 100% and another set to 125%). When this happens, the warning window might show overlapping text or partially hidden buttons, which can make the message difficult to read or interact with. This issue is addressed in KB5083631 . How to get this update Before you install this update Microsoft combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU). For general information about SSUs, see Servicing stack updates . Install this update To install this update, use one of the following Windows and Microsoft release channels. Server Update Services Before you install this update , the standalone package(s) for this update is available from the Microsoft Update Catalog website. This KB contains one or more MSU files that require installation in a specific order. You can install this update using Method 1 (install all MSU files together) or Method 2 (install each MSU file individually, in order). Method 1: Install all MSU files together Download all MSU files for KB5083769 from Microsoft Update Catalog and place them in the same folder (for example, C:/Packages). Use Deployment Image Servicing and Management (DISM.exe) to install the target update. DISM will use the folder specified in PackagePath to discover and install one or more prerequisite MSU files as needed. Updating Windows PC To apply this update to a running Windows PC, run the following command from an elevated Command Prompt: Or, run the following command from an elevated Windows PowerShell prompt: Or use Windows Update Standalone Installer to install the target update. Updating Windows Installation media To apply this update to Windows Installation media, see Update Windows installation media with Dynamic Update . When downloading other Dynamic Update packages, ensure they match the same month as this KB. If the SafeOS Dynamic Update or Setup Dynamic Update is not available for the same month as this KB, use the most recently published version of each. To add this update to a mounted image, run the following command from an elevated Command Prompt: Or, run the following command from an elevated Windows PowerShell prompt: Method 2: Install each MSU file individually, in order Download and install each MSU file individually either using DISM or Windows Update Standalone Installer in the following order: windows11.0-kb5043080-arm64_df540a05f9b118e339c5520f4090bb5d450f090b.msu windows11.0-kb5083769-arm64_4dadf0627d879901a72a6d8184fa2bb5e518a8e7.msu Before you install this update , the standalone package(s) for this update is available from the Microsoft Update Catalog website. This KB contains one or more MSU files that require installation in a specific order. You can install this update using Method 1 (install all MSU files together) or Method 2 (install each MSU file individually, in order). Method 1: Install all MSU files together Download all MSU files for KB5083769 from Microsoft Update Catalog and place them in the same folder (for example, C:/Packages). Use Deployment Image Servicing and Management (DISM.exe) to install the target update. DISM will use the folder specified in PackagePath to discover and install one or more prerequisite MSU files as needed. Updating Windows PC To apply this update to a running Windows PC, run the following command from an elevated Command Prompt: Or, run the following command from an elevated Windows PowerShell prompt: Or use Windows Update Standalone Installer to install the target update. Updating Windows Installation media To apply this update to Windows Installation media, see Update Windows installation Media with Dynamic Update . When downloading other Dynamic Update packages, ensure they match the same month as this KB. If the SafeOS Dynamic Update or Setup Dynamic Update is not available for the same month as this KB, use the most recently published version of each. To add this update to a mounted image, run the following command from an elevated Command Prompt: Or, run the following command from an elevated Windows PowerShell prompt: Method 2: Install each MSU file individually, in order Download and install each MSU file individually either using DISM or Windows Update Standalone Installer in the following order: windows11.0-kb5043080-x64_953449672073f8fb99badb4cc6d5d7849b9c83e8.msu windows11.0-kb5083769-x64_57f4bd47d73842dd239f2c18b8ce48c8bf1c1d5d.msu If you want to remove this update Caution: Before you decide to remove this update, see Understanding the risks: Why you should not uninstall security updates . To remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name by using this command: DISM /online /get-packages . Running Windows Update Standalone Installer ( wusa.exe ) with the /uninstall switch on the combined package will not work because the combined package contains the SSU. You cannot remove the SSU from the system after installation. File information For a list of the files provided in this update, download the file information for cumulative update 5083769 . For a list of the files provided in the servicing stack update, download the file information for the SSU (KB5088467) - version 26100.8247 . Microsoft Store for Business and Education with Configuration Manager Get updates for apps and games in Microsoft Store Thank you for your feedback!