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.
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 has reached end of service on December 13, 2022.[6]
Preview builds of Windows 10, version 21H1 | |||||||
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scope=col style=width:8em;text-align:center | Version | scope=col style=width:8em;text-align:center | Knowledge base | scope=col style=width:10em;text-align:center | Release date(s) | scope=col style=text-align:center | Highlights |
10.0.19043.844 | KB4601382 | Beta Channel: February 17, 2021 |
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10.0.19043.867 [7] | KB5000802 | Beta Channel: March 9, 2021 | |||||
10.0.19043.899 [8] | KB5000842 | Beta Channel: March 15, 2021 |
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10.0.19043.906 [9] | Beta Channel: March 25, 2021 | ||||||
10.0.19043.928 [10] | KB5001330 | Beta Channel and Release Preview Channel: April 13, 2021 | |||||
10.0.19043.962 [11] | KB5001391 | Beta Channel and Release Preview Channel: April 19, 2021 |
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10.0.19043.964 [12] | Beta Channel and Release Preview Channel: April 28, 2021 | ||||||
Version | Knowledge base | Release date(s) | Highlights |
Public patches of Windows 10, version 21H1 | |||||||
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scope=col style=width:8em;text-align:center | Version | scope=col style=width:8em;text-align:center | Knowledge base | scope=col style=width:10em;text-align:center | Release date(s) | scope=col style=text-align:center | Highlights |
10.0.19043.985 Version 21H1 [13] [14] [15] | KB5003173 | Beta Channel and Release Preview Channel: May 11, 2021Public release: May 18, 2021 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1023 [16] [17] | KB5003214 | Beta Channel and Release Preview Channel: May 21, 2021Public release: May 25, 2021 | |||||
10.0.19043.1052 [18] [19] | KB5003637 | Beta Channel, Release Preview Channel and public release: June 8, 2021 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1055 [20] | KB5004476 | Beta Channel, Release Preview Channel and public release: June 11, 2021 | |||||
10.0.19043.1081 [21] [22] | KB5003690 | Beta Channel and Release Preview Channel: June 17, 2021Public release: June 21, 2021 | This update is no longer available from Windows Update, Microsoft Update Catalog or other release channels since July 21, 2021.
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10.0.19043.1082 [23] | KB5004760 | Beta Channel, Release Preview Channel and public release: June 29, 2021 | |||||
10.0.19043.1083 [24] | KB5004945 | Beta Channel, Release Preview Channel and public release: July 6, 2021 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1110 [25] | KB5004237 | Beta Channel, Release Preview Channel and public release: July 13, 2021 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1147 [26] | KB5004296 | Release Preview Channel: July 15, 2021 | |||||
10.0.19043.1149 [27] | Release Preview Channel: July 20, 2021 | ||||||
10.0.19043.1151 [28] | Release Preview Channel and public release: July 29, 2021 | ||||||
10.0.19043.1165 [29] | KB5005033 | Release Preview Channel and public release: August 10, 2021 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1200 [30] | KB5005101 | Release Preview Channel: August 18, 2021 | |||||
10.0.19043.1202 [31] [32] | Release Preview Channel: August 31, 2021Public release: September 1, 2021 | ||||||
10.0.19043.1237 [33] | KB5005565 | Release Preview Channel and public release: September 14, 2021 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1263 [34] | KB5005611 | Release Preview Channel: September 23, 2021 | |||||
10.0.19043.1266 [35] | Release Preview Channel and public release: September 30, 2021 | ||||||
10.0.19043.1288 [36] | KB5006670 | Release Preview Channel and public release: October 12, 2021 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1319 [37] | KB5006738 | Release Preview Channel: October 19, 2021 | |||||
10.0.19043.1320 [38] [39] | Release Preview Channel and public release: October 26, 2021 | ||||||
10.0.19043.1348 [40] | KB5007186 | Release Preview Channel and public release: November 9, 2021 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1379 [41] | KB5007253 | Release Preview Channel: November 16, 2021 | |||||
10.0.19043.1381 [42] | Release Preview Channel: November 18, 2021 | ||||||
10.0.19043.1387 [43] | Release Preview Channel and public release: November 22, 2021 | ||||||
10.0.19043.1415 [44] | KB5008212 | Public release: December 14, 2021 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1466 [45] | KB5009543 | Public release: January 11, 2022 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1469 [46] | KB5010793 | Public release: January 17, 2022 | |||||
10.0.19043.1503 [47] | KB5009596 | Public release: January 25, 2022 | |||||
10.0.19043.1526 [48] | KB5010342 | Public release: February 8, 2022 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1566 [49] | KB5010415 | Public release: February 15, 2022 | |||||
10.0.19043.1586 [50] | KB5011487 | Public release: March 8, 2022 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1620 [51] | KB5011543 | Public release: March 22, 2022 | |||||
10.0.19043.1645 [52] | KB5012599 | Public release: April 12, 2022 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1682 [53] | KB5011831 | Public release: April 25, 2022 | |||||
10.0.19043.1706 [54] | KB5013942 | Public release: May 10, 2022 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1708 [55] | KB5015020 | Public release: May 19, 2022 | |||||
10.0.19043.1741 [56] | KB5014023 | Public release: June 2, 2022 | |||||
10.0.19043.1766 [57] | KB5014699 | Public release: June 14, 2022 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1767 [58] | KB5016139 | Public release: June 20, 2022 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1806 [59] | KB5014666 | Public release: June 28, 2022 | |||||
10.0.19043.1826 [60] | KB5014666 | Public release: July 12, 2022 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1865 [61] | KB5015878 | Public release: July 26, 2022 | |||||
10.0.19043.1889 [62] | KB5016616 | Public release: August 9, 2022 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.1949 [63] | KB5016688 | Public release: August 26, 2022 | |||||
10.0.19043.2006 [64] | KB5017308 | Public release: September 13, 2022 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.2075 [65] | KB5017380 | Public release: September 20, 2022 | |||||
10.0.19043.2130 [66] | KB5018410 | Public release: October 11, 2022 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.2132 [67] | KB5020435 | Public release: October 17, 2022 | |||||
10.0.19043.2193 [68] | KB5018482 | Public release: October 25, 2022 | |||||
10.0.19043.2194 [69] | KB5020953 | Public release: October 28, 2022 | |||||
10.0.19043.2251 [70] | KB5019959 | Public release: November 8, 2022 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
10.0.19043.2311 [71] | KB5020030 | Public release: November 15, 2022 | |||||
10.0.19043.2364 [72] | KB5021233 | Public release: December 13, 2022 | This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. | ||||
Version | Knowledge base | Release date(s) | Highlights |