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Find information on known issues and the servicing status for Windows 10 Enterprise LTSC 2021 and Windows 10 IoT Enterprise LTSC 2021. For immediate help with Windows update issues, click here if you are using a Windows device to open the Get Help app or go to support.microsoft.com. Follow @WindowsUpdate on X for Windows release health updates. If you are an IT administrator and want to programmatically get information from this page, use the Windows Updates API in Microsoft Graph.
Current status as of May 2, 2025
Windows 10 Enterprise LTSC 2021 and Windows 10 IoT Enterprise LTSC 2021 will have mainstream support until January 12, 2027.
Windows 10, version 21H2 Home and Pro editions reached end of servicing on June 13, 2023. Education and Enterprise editions reached end of servicing on June 11, 2024. Devices running these editions do not receive security updates containing protections from the latest security threats.
As always, we recommend that you upgrade eligible devices to Windows 11. For information about servicing timelines and lifecycle, see Windows 11 release information, Windows 10 release information, Windows Lifecycle FAQ, and Microsoft Lifecycle Policy search tool.
Known issues
See open issues, content updated in the last 30 days, and information on safeguard holds. To find a specific issue, use the search function on your browser (CTRL + F for Microsoft Edge).
| Summary | Originating update | Status | Last updated |
|---|---|---|---|
| The April 2025 Windows RE update might show as unsuccessful in Windows Update Users might observe installation failure while trying to install the WinRE update which resolves after device restarts. | N/A KB5057589 2025-04-08 | Resolved KB5063523 | 2025-07-08 10:02 PT |
| Enterprise customers might be unable to use Microsoft Connected Cache This issue affects Windows devices which use the DHCP Option 235 to configure the Microsoft Connected Cache endpoint | OS Build 19044.4046 KB5034763 2024-02-13 | Mitigated | 2024-04-05 11:43 PT |
Issue details
April 2025
The April 2025 Windows RE update might show as unsuccessful in Windows Update
| Status | Originating update | History |
|---|---|---|
| Resolved KB5063523 | N/A KB5057589 2025-04-08 | Resolved: 2025-07-08, 10:00 PT Opened: 2025-04-11, 17:03 PT |
After installing the April 2025 Windows Recovery Environment update [KB5057589], you might see the following error message in the Windows Update settings page: 0x80070643 – ERROR_INSTALL_FAILURE. This error message is not accurate and does not impact the update or device functionality. The Windows Recovery Environment (WinRE) is a recovery environment that can repair common causes of unbootable operating systems.
This error is observed when the device installs the WinRE update when there is another update in a pending reboot state. Although the error message suggests the update did not complete, the WinRE update is typically applied successfully after the device restarts. Windows Update might continue to display the update as failed until the next daily scan, at which point the update is no longer offered and the failure message is cleared automatically.
Resolution:
The ERROR_INSTALL_FAILURE error message that was previously observed with KB5057589 installed before 2 PM PT on April 21, 2025 has been resolved with the Windows update released July 8, 2025 (KB5063523). We recommend you install the latest update for your device as it contains important improvements and issue resolutions.
Please note: This update does not remove the incorrect error message which might still appear in the Windows Update History page.
Users who installed KB5057589 after 2 PM PT on April 21, 2025, should not observe the incorrect error message about the install failure. If the update is already installed, it will not be offered again, and the status of this update can be verified with the Dism /Online /Get-Packages command.
Affected platforms:
- Client: Windows 10, version 22H2; Windows 10, version 21H2
- Server: Windows Server 2022
April 2024
Enterprise customers might be unable to use Microsoft Connected Cache
| Status | Originating update | History |
|---|---|---|
| Mitigated | OS Build 19044.4046 KB5034763 2024-02-13 | Last updated: 2024-04-05, 11:43 PT Opened: 2024-04-05, 11:09 PT |
After installing the February 2024 Windows security update (KB5034763), released February 13, 2024, or later updates, some Windows devices which use the DHCP Option 235 for discovery of Microsoft Connected Cache (MCC) nodes in their network might be unable to use the MCC nodes. Instead, these Windows devices will download updates and apps from the public internet and IT administrators would see increased download traffic on their internet routes.
Home users of Windows are unlikely to experience this issue, as Microsoft Connected Cache configured via DHCP Option 235 is more commonly used in enterprise environments.
Workaround:
- Option1: Configure Microsoft Connected Cache endpoint in DOCacheHost policy as indicated in Cache hostname. Additionally, DOCacheHostSource has to be set to 1 or removed as indicated in Cache hostname source. Note that by default, the DOCacheHost and DOCacheHostSource policies have no value.
- Option2: This issue can also be mitigated using Group Policies available through our support channel. Organizations can request help through Support for business.
Next steps: We are working on a resolution and will provide an update in an upcoming release.
Affected platforms:
- Client: Windows 10, version 21H2, Windows 10, version 22H2
- Server: None
Report a problem with Windows updates
To report an issue to Microsoft at any time, use the Feedback Hub app. To learn more, see Send feedback to Microsoft with the Feedback Hub app.
Need help with Windows updates?
Search, browse, or ask a question on the Microsoft Support Community. If you are an IT pro supporting an organization, visit Windows release health on the Microsoft 365 admin center for additional details.
For direct help with your home PC, use the Get Help app in Windows or contact Microsoft Support. Organizations can request immediate support through Support for business.
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