The Windows 10 May 2021 Update[1] (codenamed "21H1"[2]) is the twelfth stable build for Windows 10. It carries the build number 10.0.19043.

Version history

The first preview was released to Insiders who opted in to Beta Channel on February 17, 2021.[3] The update began rolling out on May 18, 2021.[4] Notable changes in the May 2021 Update include:[5]

The update reached end of service after the release of build 19043.2364 on December 13, 2022.[6][7]

Preview builds of Windows 10, version 21H1
Version Knowledge base Release date(s) Highlights
10.0.19043.844
[3]		 KB4601382 Beta Channel:
February 17, 2021
  • Added multi-camera support for Windows Hello
  • Performance improvements to Windows Defender Application Guard and WMI Group Policy Service
10.0.19043.867
[8]		 KB5000802 Beta Channel:
March 9, 2021
10.0.19043.899
[9]		 KB5000842 Beta Channel:
March 15, 2021
10.0.19043.906
[10]		 Beta Channel:
March 25, 2021
10.0.19043.928
[11]		 KB5001330 Beta Channel and Release Preview Channel:
April 13, 2021
10.0.19043.962
[12]		 KB5001391 Beta Channel and Release Preview Channel:
April 19, 2021
  • New "News and Interests" feature on the taskbar
10.0.19043.964
[13]		 Beta Channel and Release Preview Channel:
April 28, 2021
Version Knowledge base Release date(s) Highlights
Public patches of Windows 10, version 21H1
Version Knowledge base Release date(s) Highlights
10.0.19043.985
Version 21H1
[14][15][16]		 KB5003173 Beta Channel and Release Preview Channel:
May 11, 2021

Public release:
May 18, 2021

 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1023
[17][18]		 KB5003214 Beta Channel and Release Preview Channel:
May 21, 2021

Public release:
May 25, 2021
10.0.19043.1052
[19][20]		 KB5003637 Beta Channel, Release Preview Channel and public release:
June 8, 2021		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1055
[21]		 KB5004476 Beta Channel, Release Preview Channel and public release:
June 11, 2021
10.0.19043.1081
[22][23]		 KB5003690 Beta Channel and Release Preview Channel:
June 17, 2021

Public release:
June 21, 2021

 This update is no longer available from Windows Update, Microsoft Update Catalogue, or other release channels since July 21, 2021.
10.0.19043.1082
[24]		 KB5004760 Beta Channel, Release Preview Channel and public release:
June 29, 2021
10.0.19043.1083
[25]		 KB5004945 Beta Channel, Release Preview Channel and public release:
July 6, 2021		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1110
[26]		 KB5004237 Beta Channel, Release Preview Channel and public release:
July 13, 2021		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1147
[27]		 KB5004296 Release Preview Channel:
July 15, 2021
10.0.19043.1149
[28]		 Release Preview Channel:
July 20, 2021
10.0.19043.1151
[29]		 Release Preview Channel and public release:
July 29, 2021
10.0.19043.1165
[30]		 KB5005033 Release Preview Channel and public release:
August 10, 2021		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1200
[31]		 KB5005101 Release Preview Channel:
August 18, 2021
10.0.19043.1202
[32][33]		 Release Preview Channel:
August 31, 2021

Public release:
September 1, 2021
10.0.19043.1237
[34]		 KB5005565 Release Preview Channel and public release:
September 14, 2021		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1263
[35]		 KB5005611 Release Preview Channel:
September 23, 2021
10.0.19043.1266
[36]		 Release Preview Channel and public release:
September 30, 2021
10.0.19043.1288
[37]		 KB5006670 Release Preview Channel and public release:
October 12, 2021		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1319
[38]		 KB5006738 Release Preview Channel:
October 19, 2021
10.0.19043.1320
[39][40]		 Release Preview Channel and public release:
October 26, 2021
10.0.19043.1348
[41]		 KB5007186 Release Preview Channel and public release:
November 9, 2021		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1379
[42]		 KB5007253 Release Preview Channel:
November 16, 2021
10.0.19043.1381
[43]		 Release Preview Channel:
November 18, 2021
10.0.19043.1387
[44]		 Release Preview Channel and public release:
November 22, 2021
10.0.19043.1415
[45]		 KB5008212 Public release:
December 14, 2021		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1466
[46]		 KB5009543 Public release:
January 11, 2022		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1469
[47]		 KB5010793 Public release:
January 17, 2022
10.0.19043.1503
[48]		 KB5009596 Public release:
January 25, 2022
10.0.19043.1526
[49]		 KB5010342 Public release:
February 8, 2022		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1566
[50]		 KB5010415 Public release:
February 15, 2022
10.0.19043.1586
[51]		 KB5011487 Public release:
March 8, 2022		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1620
[52]		 KB5011543 Public release:
March 22, 2022
10.0.19043.1645
[53]		 KB5012599 Public release:
April 12, 2022		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1682
[54]		 KB5011831 Public release:
April 25, 2022
10.0.19043.1706
[55]		 KB5013942 Public release:
May 10, 2022		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1708
[56]		 KB5015020 Public release:
May 19, 2022
10.0.19043.1741
[57]		 KB5014023 Public release:
June 2, 2022
10.0.19043.1766
[58]		 KB5014699 Public release:
June 14, 2022		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1767
[59]		 KB5016139 Public release:
June 20, 2022		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1806
[60]		 KB5014666 Public release:
June 28, 2022
10.0.19043.1826
[61]		 KB5014666 Public release:
July 12, 2022		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1865
[62]		 KB5015878 Public release:
July 26, 2022
10.0.19043.1889
[63]		 KB5016616 Public release:
August 9, 2022		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.1949
[64]		 KB5016688 Public release:
August 26, 2022
10.0.19043.2006
[65]		 KB5017308 Public release:
September 13, 2022		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.2075
[66]		 KB5017380 Public release:
September 20, 2022
10.0.19043.2130
[67]		 KB5018410 Public release:
October 11, 2022		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.2132
[68]		 KB5020435 Public release:
October 17, 2022
10.0.19043.2193
[69]		 KB5018482 Public release:
October 25, 2022
10.0.19043.2194
[70]		 KB5020953 Public release:
October 28, 2022
10.0.19043.2251
[71]		 KB5019959 Public release:
November 8, 2022		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
10.0.19043.2311
[72]		 KB5020030 Public release:
November 15, 2022
10.0.19043.2364
[7]		 KB5021233 Public release:
December 13, 2022		 This update is no longer available from Microsoft Update Catalogue, or other release channels since September 12, 2023. However, this patch continues to be available from Windows Update.
Version Knowledge base Release date(s) Highlights

See also

References

  1. ↑ "Preparing the Windows 10 May 2021 Update for Release". Windows Experience Blog. April 28, 2021. Retrieved April 29, 2020.
  2. ↑ Cable, John (February 17, 2021). "Introducing the next feature update to Windows 10, version 21H1". Windows Insider Blog.
  3. 1 2 "Announcing Windows 10 Insider Preview Build 19043.844 (21H1)". Windows Insider Blog. February 17, 2021.
  4. ↑ "How to get the Windows 10 May 2021 Update". Windows Experience Blog. May 18, 2021. Retrieved May 19, 2021.
  5. ↑ "What's new in Windows 10, version 21H1 for IT Pros". Microsoft. May 18, 2020. Retrieved May 19, 2020.
  6. ↑ "Windows 10, version 21H1 has reached end of servicing". Microsoft Learn. Microsoft. September 14, 2021. Retrieved December 15, 2021.
  7. 1 2 "December 13, 2022—KB5021233 (OS Builds 19042.2364, 19043.2364, 19044.2364, and 19045.2364)". Microsoft Support. Microsoft. Retrieved December 13, 2022.
  8. ↑ "Releasing Windows 10 Build 19043.867 (21H1) to Beta Channel". Windows Insider Blog. March 10, 2021.
  9. ↑ "Releasing Windows 10 Build 19043.899 (21H1) to Beta Channel". Windows Insider Blog. March 16, 2021.
  10. ↑ "Releasing Windows 10 Build 19043.906 (21H1) to Beta Channel". Windows Insider Blog. March 25, 2021.
  11. ↑ "Releasing Windows 10 Build 19043.928 (21H1) to Beta & Release Preview Channels". Windows Insider Blog. April 14, 2021.
  12. ↑ "Releasing Windows 10 Build 19043.962 (21H1) to Beta Channel & Release Preview Channels". Windows Insider Blog. Microsoft. April 19, 2021. Retrieved April 20, 2021.
  13. ↑ "Releasing Windows 10 Build 19043.964 (21H1) to Beta & Release Preview Channels". Windows Insider Blog. Microsoft. April 28, 2021. Retrieved April 29, 2021.
  14. ↑ "Releasing Windows 10 Build 19043.985 (21H1) to Beta & Release Preview Channels". Windows Insider Blog. Microsoft. May 11, 2021. Retrieved May 12, 2021.
  15. ↑ "May 11, 2021—KB5003173 (OS Builds 19041.985, 19042.985, and 19043.985)". Microsoft Support. Microsoft. Retrieved May 12, 2021.
  16. ↑ "Windows 10 release information". Microsoft Learn. Microsoft. Retrieved October 19, 2022.
  17. ↑ "Releasing Windows 10 Build 19043.1023 (21H1) to Beta & Release Preview Channels". Windows Insider Blog. Microsoft. May 21, 2021. Retrieved May 22, 2021.
  18. ↑ "May 25, 2021—KB5003214 (OS Builds 19041.1023, 19042.1023, and 19043.1023) Preview". Microsoft Support. Microsoft. Retrieved June 9, 2021.
  19. ↑ "Releasing Windows 10 Build 19043.1052 (21H1) to Beta & Release Preview Channels". Windows Insider Blog. Microsoft. June 8, 2021. Retrieved June 9, 2021.
  20. ↑ "June 8, 2021—KB5003637 (OS Builds 19041.1052, 19042.1052, and 19043.1052)". Microsoft Support. Microsoft. Retrieved June 9, 2021.
  21. ↑ "June 11, 2021—KB5004476 (OS Builds 19041.1055, 19042.1055, and 19043.1055) Out-of-band". Microsoft Support. Microsoft. Retrieved June 16, 2021.
  22. ↑ "Releasing Windows 10 Build 19043.1081 (21H1) to Beta & Release Preview Channels". Windows Insider Blog. Microsoft. June 17, 2021. Retrieved June 18, 2021.
  23. ↑ "June 21, 2021—KB5003690 (OS Builds 19041.1081, 19042.1081, and 19043.1081) Preview - EXPIRED". Microsoft Support. Microsoft. Archived from the original on June 21, 2021. Retrieved June 23, 2021.
  24. ↑ "June 29, 2021—KB5004760 (OS Builds 19041.1082, 19042.1082, and 19043.1082) Out-of-band". Microsoft Support. Microsoft. Retrieved June 30, 2021.
  25. ↑ "July 6, 2021—KB5004945 (OS Builds 19041.1083, 19042.1083, and 19043.1083) Out-of-band". Microsoft Support. Microsoft. Retrieved July 8, 2021.
  26. ↑ "July 13, 2021—KB5004237 (OS Builds 19041.1110, 19042.1110, and 19043.1110)". Microsoft Support. Microsoft. Retrieved July 14, 2021.
  27. ↑ "Releasing Windows 10 Build 19043.1147 (21H1) to Release Preview Channel". Windows Insider Blog. Microsoft. July 15, 2021. Retrieved July 16, 2021.
  28. ↑ "Releasing Windows 10 Build 19043.1149 (21H1) to Release Preview Channel". Windows Insider Blog. Microsoft. July 21, 2021. Retrieved July 21, 2021.
  29. ↑ "July 29, 2021—KB5004296 (OS Builds 19041.1151, 19042.1151, and 19043.1151) Preview". Microsoft Support. Microsoft. Retrieved July 30, 2021.
  30. ↑ "August 10, 2021—KB5005033 (OS Builds 19041.1165, 19042.1165, and 19043.1165)". Microsoft Support. Microsoft. Retrieved August 11, 2021.
  31. ↑ "Releasing Windows 10 Build 19043.1200 (21H1) to Release Preview Channel". Windows Insider Blog. Microsoft. August 18, 2021. Retrieved August 18, 2021.
  32. ↑ "Releasing Windows 10 Build 19043.1202 (21H1) to Release Preview Channel". Windows Insider Blog. Microsoft. August 31, 2021. Retrieved September 1, 2021.
  33. ↑ "September 1, 2021—KB5005101 (OS Builds 19041.1202, 19042.1202, and 19043.1202) Preview". Microsoft Support. Microsoft. Archived from the original on September 1, 2021. Retrieved September 2, 2021.
  34. ↑ "September 14, 2021—KB5005565 (OS Builds 19041.1237, 19042.1237, and 19043.1237)". Microsoft Support. Microsoft. Retrieved September 14, 2021.
  35. ↑ "Releasing Windows 10 Build 19043.1263 (21H1) to Release Preview Channel". Windows Insider Blog. Microsoft. September 23, 2021. Retrieved September 23, 2021.
  36. ↑ "September 30, 2021—KB5005611 (OS Builds 19041.1266, 19042.1266, and 19043.1266) Preview". Microsoft Support. Microsoft. Archived from the original on September 30, 2021. Retrieved October 1, 2021.
  37. ↑ "October 12, 2021—KB5006670 (OS Builds 19041.1288, 19042.1288, and 19043.1288)". Microsoft Support. Microsoft. Retrieved October 12, 2021.
  38. ↑ "Releasing Windows 10 Build 19043.1319 (21H1) to Release Preview Channel". Windows Insider Blog. Microsoft. October 19, 2021. Retrieved October 20, 2021.
  39. ↑ "Releasing Windows 10 Build 19043.1320 (21H1) to Release Preview Channel". Windows Insider Blog. October 26, 2021. Retrieved October 28, 2021.
  40. ↑ "October 26, 2021—KB5006738 (OS Builds 19041.1320, 19042.1320, and 19043.1320) Preview". Microsoft Support. Microsoft. Archived from the original on October 26, 2021. Retrieved October 26, 2021.
  41. ↑ "November 9, 2021—KB5007186 (OS Builds 19041.1348, 19042.1348, and 19043.1348)". Microsoft Support. Microsoft. Retrieved November 9, 2021.
  42. ↑ "Releasing Windows 10 Build 19044.1379/19043.1379 to Release Preview Channel". Windows Insider Blog. November 16, 2021. Retrieved November 16, 2021.
  43. ↑ "Releasing Windows 10 Build 19044.1381/19043.1381 to Release Preview Channel". Windows Insider Blog. November 18, 2021. Retrieved November 19, 2021.
  44. ↑ "November 22, 2021—KB5007253 (OS Builds 19041.1387, 19042.1387, 19043.1387, and 19044.1387) Preview". Microsoft Support. Microsoft. Archived from the original on November 23, 2021. Retrieved November 23, 2021.
  45. ↑ "December 14, 2021—KB5008212 (OS Builds 19041.1415, 19042.1415, 19043.1415, and 19044.1415)". Microsoft Support. Microsoft. Retrieved December 15, 2021.
  46. ↑ "January 11, 2022—KB5009543 (OS Builds 19042.1466, 19043.1466, and 19044.1466)". Microsoft Support. Microsoft. Retrieved January 12, 2022.
  47. ↑ "January 17, 2022—KB5010793 (OS Builds 19042.1469, 19043.1469, and 19044.1469) Out-of-band". Microsoft Support. Microsoft. Retrieved January 18, 2022.
  48. ↑ "January 25, 2022—KB5009596 (OS Builds 19042.1503, 19043.1503, and 19044.1503) Preview". Microsoft Support. Microsoft. Archived from the original on January 26, 2022. Retrieved January 25, 2022.
  49. ↑ "February 8, 2022—KB5010342 (OS Builds 19042.1526, 19043.1526, and 19044.1526)". Microsoft Support. Microsoft. Retrieved February 9, 2022.
  50. ↑ "February 15, 2022—KB5010415 (OS Builds 19042.1566, 19043.1566, and 19044.1566) Preview". Microsoft Support. Microsoft. Archived from the original on February 15, 2022. Retrieved February 15, 2022.
  51. ↑ "March 8, 2022—KB5011487 (OS Builds 19042.1586, 19043.1586, and 19044.1586)". Microsoft Support. Microsoft. Retrieved March 8, 2022.
  52. ↑ "March 22, 2022—KB5011543 (OS Builds 19042.1620, 19043.1620, and 19044.1620) Preview". Microsoft Support. Microsoft. Archived from the original on March 23, 2022. Retrieved March 22, 2022.
  53. ↑ "April 12, 2022—KB5012599 (OS Builds 19042.1645, 19043.1645, and 19044.1645)". Microsoft Support. Microsoft. Retrieved April 13, 2022.
  54. ↑ "April 25, 2022—KB5011831 (OS Builds 19042.1682, 19043.1682, and 19044.1682) Preview". Microsoft Support. Microsoft. Archived from the original on April 26, 2022. Retrieved April 25, 2022.
  55. ↑ "May 10, 2022—KB5013942 (OS Builds 19042.1706, 19043.1706, and 19044.1706)". Microsoft Support. Microsoft. Retrieved May 11, 2022.
  56. ↑ "May 19, 2022—KB5015020 (OS Builds 19042.1708) Out-of-band". Microsoft Support. Microsoft. Retrieved May 26, 2022.
  57. ↑ "June 2, 2022—KB5014023 (OS Builds 19042.1741, 19043.1741, and 19044.1741) Preview". Microsoft Support. Microsoft. Archived from the original on June 2, 2022. Retrieved June 2, 2022.
  58. ↑ "June 14, 2022—KB5014699 (OS Builds 19042.1766, 19043.1766, and 19044.1766)". Microsoft Support. Microsoft. Retrieved June 14, 2022.
  59. ↑ "June 20, 2022—KB5016139 (OS Builds 19042.1767, 19043.1767, and 19044.1767) Out-of-band". Microsoft Support. Microsoft. Archived from the original on June 20, 2022. Retrieved June 21, 2022.
  60. ↑ "June 28, 2022—KB5014666 (OS Builds 19042.1806, 19043.1806, and 19044.1806) Preview". Microsoft Support. Microsoft. Archived from the original on June 28, 2022. Retrieved June 28, 2022.
  61. ↑ "July 12, 2022—KB5015807 (OS Builds 19042.1826, 19043.1826, and 19044.1826)". Microsoft Support. Microsoft. Retrieved July 12, 2022.
  62. ↑ "July 26, 2022—KB5015878 (OS Builds 19042.1865, 19043.1865, and 19044.1865) Preview". Microsoft Support. Microsoft. Retrieved July 27, 2022.
  63. ↑ "August 9, 2022—KB5016616 (OS Builds 19042.1889, 19043.1889, and 19044.1889)". Microsoft Support. Microsoft. Retrieved August 9, 2022.
  64. ↑ "August 26, 2022—KB5016688 (OS Builds 19042.1949, 19043.1949, and 19044.1949) Preview". Microsoft Support. Microsoft. Archived from the original on August 26, 2022. Retrieved August 26, 2022.
  65. ↑ "September 13, 2022—KB5017308 (OS Builds 19042.2006, 19043.2006, and 19044.2006)". Microsoft Support. Microsoft. Retrieved September 13, 2022.
  66. ↑ "September 20, 2022—KB5017380 (OS Builds 19042.2075, 19043.2075, and 19044.2075) Preview". Microsoft Support. Microsoft. Archived from the original on September 20, 2022. Retrieved September 20, 2022.
  67. ↑ "October 11, 2022—KB5018410 (OS Builds 19042.2130, 19043.2130, and 19044.2130)". Microsoft Support. Microsoft. Retrieved October 12, 2022.
  68. ↑ "October 17, 2022—KB5020435 (OS Builds 19042.2132, 19043.2132, and 19044.2132) Out-of-band". Microsoft Support. Microsoft. Retrieved October 18, 2022.
  69. ↑ "October 25, 2022—KB5018482 (OS Builds 19042.2193, 19043.2193, and 19044.2193) Preview". Microsoft Support. Microsoft. Retrieved October 26, 2022.
  70. ↑ "October 28, 2022—KB5020953 (OS Builds 19042.2194, 19043.2194, 19044.2194 and 19045.2194) Out-of-band". Microsoft Support. Microsoft. Retrieved October 29, 2022.
  71. ↑ "November 8, 2022—KB5019959 (OS Builds 19042.2251, 19043.2251, 19044.2251, and 19045.2251)". Microsoft Support. Microsoft. Retrieved November 9, 2022.
  72. ↑ "November 15, 2022—KB5020030 (OS Builds 19042.2311, 19043.2311, 19044.2311, and 19045.2311) Preview". Microsoft Support. Microsoft. Retrieved November 16, 2022.
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