# Windows 10, version 21H1

The Windows 10 May 2021 Update (codenamed "21H1") is the eleventh major update to 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. The update began rolling out on May 18, 2021. Notable changes in the May 2021 Update include:
* Added multi-camera support for Windows Hello
* New "News and Interests" feature on the taskbar
* Performance improvements to Windows Defender Application Guard and WMI Group Policy Service
The update has reached end of service on December 13, 2022.
Preview builds of Windows 10, version 21H1 :
| Version | Knowledge base | Release date(s) | Highlights |
| 10.0.19043.844 | 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 | KB5000802 | Beta Channel: March 9, 2021 | |
| 10.0.19043.899 | KB5000842 | Beta Channel: March 15, 2021 | Replaced EdgeHTML-based Microsoft Edge Legacy with Chromium-based Microsoft Edge |
| 10.0.19043.906 | KB5000842 | Beta Channel: March 25, 2021 | |
| 10.0.19043.928 | KB5001330 | Beta Channel and Release Preview Channel: April 13, 2021 | |
| 10.0.19043.962 | KB5001391 | Beta Channel and Release Preview Channel: April 19, 2021 | New "News and Interests" feature on the taskbar |
| 10.0.19043.964 | KB5001391 | 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 | KB5003173 | Beta Channel and Release Preview Channel: May 11, 2021 Public 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 | KB5003214 | Beta Channel and Release Preview Channel: May 21, 2021 Public release: May 25, 2021 | |
| 10.0.19043.1052 | 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 | KB5004476 | Beta Channel, Release Preview Channel and public release: June 11, 2021 | |
| 10.0.19043.1081 | 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 Catalog or other release channels since July 21, 2021. First preview update which included the removal of Adobe Flash Player. Added support for USB Test and Measurement Class (USBTMC) interface |
| 10.0.19043.1082 | KB5004760 | Beta Channel, Release Preview Channel and public release: June 29, 2021 | |
| 10.0.19043.1083 | 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 | 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 | KB5004296 | Release Preview Channel: July 15, 2021 | |
| 10.0.19043.1149 | KB5004296 | Release Preview Channel: July 20, 2021 | |
| 10.0.19043.1151 | KB5004296 | Release Preview Channel and public release: July 29, 2021 | |
| 10.0.19043.1165 | 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 | KB5005101 | Release Preview Channel: August 18, 2021 | |
| 10.0.19043.1202 | KB5005101 | Release Preview Channel: August 31, 2021 Public release: September 1, 2021 | |
| 10.0.19043.1237 | 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 | KB5005611 | Release Preview Channel: September 23, 2021 | |
| 10.0.19043.1266 | KB5005611 | Release Preview Channel and public release: September 30, 2021 | |
| 10.0.19043.1288 | 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 | KB5006738 | Release Preview Channel: October 19, 2021 | |
| 10.0.19043.1320 | KB5006738 | Release Preview Channel and public release: October 26, 2021 | |
| 10.0.19043.1348 | 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 | KB5007253 | Release Preview Channel: November 16, 2021 | |
| 10.0.19043.1381 | KB5007253 | Release Preview Channel: November 18, 2021 | |
| 10.0.19043.1387 | KB5007253 | Release Preview Channel and public release: November 22, 2021 | |
| 10.0.19043.1415 | 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 | 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 | KB5010793 | Public release: January 17, 2022 | |
| 10.0.19043.1503 | KB5009596 | Public release: January 25, 2022 | |
| 10.0.19043.1526 | 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 | KB5010415 | Public release: February 15, 2022 | |
| 10.0.19043.1586 | 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 | KB5011543 | Public release: March 22, 2022 | |
| 10.0.19043.1645 | 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 | KB5011831 | Public release: April 25, 2022 | |
| 10.0.19043.1706 | 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 | KB5015020 | Public release: May 19, 2022 | |
| 10.0.19043.1741 | KB5014023 | Public release: June 2, 2022 | |
| 10.0.19043.1766 | 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 | 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 | KB5014666 | Public release: June 28, 2022 | |
| 10.0.19043.1826 | 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 | KB5015878 | Public release: July 26, 2022 | |
| 10.0.19043.1889 | 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 | KB5016688 | Public release: August 26, 2022 | |
| 10.0.19043.2006 | 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 | KB5017380 | Public release: September 20, 2022 | |
| 10.0.19043.2130 | 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 | KB5020435 | Public release: October 17, 2022 | |
| 10.0.19043.2193 | KB5018482 | Public release: October 25, 2022 | |
| 10.0.19043.2194 | KB5020953 | Public release: October 28, 2022 | |
| 10.0.19043.2251 | 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 | KB5020030 | Public release: November 15, 2022 | |
| 10.0.19043.2364 | 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 |