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Find information on known issues and the servicing status for Windows 10, version 1809 and Windows Server 2019. 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 (formerly Twitter) 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 2019, Windows 10 IoT Enterprise LTSC 2019, and Windows Server 2019 will have mainstream support until January 9, 2029.
As of May 11, 2021, all editions of Windows 10, version 1809 and Windows Server 2019, except LTSC editions, have reached end of servicing. Devices running these editions will no longer receive security updates containing protections from the latest security threats.
As always, we recommend that you upgrade eligible devices to the latest version of Windows as soon as possible to ensure that you can take advantage of features and advanced protections from the latest security threats. For information about servicing timelines and lifecycle, see the Windows 11 release information, Windows 10 release information, Windows Server 2019, 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 |
|---|---|---|---|
| Apps might become unresponsive when saving files to cloud-backed storage Affected apps include Outlook, which can become unresponsive when accessing PST files stored on Microsoft OneDrive. | OS Build 17763.8276 KB5073723 2026-01-13 | Confirmed | 2026-01-20 22:11 PT |
| Connection and authentication failures in Azure Virtual Desktop and Windows 365 January 2026 Windows update causes Windows App credential prompt failures on Azure Virtual Desktop and Windows 365 | OS Build 17763.8276 KB5073723 2026-01-13 | Resolved KB5077795 | 2026-01-17 18:06 PT |
| Windows Server 2022 and Server 2019 unexpectedly upgraded to Windows Server 2025 This issue has been mitigated. It was observed when updates were managed through some third-party applications. | N/A | Mitigated | 2024-11-13 17:15 PT |
Issue details
January 2026
Apps might become unresponsive when saving files to cloud-backed storage
| Status | Originating update | History |
|---|---|---|
| Confirmed | OS Build 17763.8276 KB5073723 2026-01-13 | Last updated: 2026-01-20, 22:11 PT Opened: 2026-01-20, 22:10 PT |
After installing Windows updates released on or after January 13, 2026 (KB5073723), some applications might become unresponsive or experience unexpected errors when opening files from or saving files to cloud-backed storage, such as OneDrive or Dropbox.
For example, in some configurations of Outlook that store PST files on OneDrive, Outlook might become unresponsive and fail to reopen unless its process is terminated in Task Manager, or the system is restarted. In addition, sent emails might not appear in the Sent Items folder, and previously downloaded might be downloaded again.
Workaround:
If you are experiencing this issue, please contact the application developer for possible alternative methods of accessing the files.
For Outlook-specific scenarios, moving the PST files out of OneDrive should resolve the issue. For guidance, please see documentation at How to remove an Outlook .pst data file from OneDrive. In addition, email accounts can still be accessed via webmail, if supported by your email provider.
Organizations and IT administrations who need urgent help with a mitigation, should contact Microsoft Support for business.
Next steps:
We are working on releasing a resolution for this issue as soon as possible. We will provide an update when more information is available.
Affected platforms:
- Client: Windows 11, version 25H2; Windows 11, version 24H2; Windows 11, version 23H2; Windows 10, version 22H2; Windows 10 Enterprise LTSC 2021; Windows 10 Enterprise LTSC 2019
- Server: Windows Server 2025; Windows Server, version 23H2; Windows Server 2022; Windows Server 2019
Connection and authentication failures in Azure Virtual Desktop and Windows 365
| Status | Originating update | History |
|---|---|---|
| Resolved KB5077795 | OS Build 17763.8276 KB5073723 2026-01-13 | Resolved: 2026-01-17, 14:00 PT Opened: 2026-01-14, 00:52 PT |
After installing the January 2026 Windows security update (KB5073723), credential prompt failures might occur in some remote connection applications. This includes remote desktop connections using the Windows App on Windows client devices, on Azure Virtual Desktop and Windows 365. The Windows App is affected by this issue on specific Windows builds and can experience sign-in failures.
Other remote connections and related applications may be similarly impacted.
Resolution: To address this issue, an out-of-band (OOB) update was released January 17, 2026, in the Microsoft Update Catalog. It can be found as KB5077795.
If you have not yet deployed the January 2026 Windows security update and your IT environment includes the affected applications and features, we recommend applying this OOB update instead. For additional guidance, see How to download updates from the Microsoft Update Catalog. As always, we recommend you install the latest update for your device as it contains important improvements and issue resolutions including this one.
If the OOB is not installed, one of the following connection options can be used as a temporary workaround:
- Use the Remote Desktop client for Windows to connect to Azure Virtual Desktop here (/previous-versions/remote-desktop-client/whats-new-windows?tabs=windows-msrdc-msi)
- Connect using the Windows App Web Client at windows.cloud.microsoft
Affected platforms:
- Client: Windows 11, version 25H2; Windows 11, version 24H2; Windows 11, version 23H2; Windows 10, version 22H2; Windows 10, version 21H2, Windows 10 Enterprise LTSC 2019
- Server: Windows Server 2025; Windows Server 2022; Windows Server 2019
November 2024
Windows Server 2022 and Server 2019 unexpectedly upgraded to Windows Server 2025
| Status | Originating update | History |
|---|---|---|
| Mitigated | N/A | Last updated: 2024-11-13, 17:15 PT Opened: 2024-11-09, 12:16 PT |
Windows Server 2025 is intended to be offered as an Optional upgrade in Windows Update settings for devices running Windows Server 2019 and Windows Server 2022. Two scenarios were observed in certain environments:
- Some devices upgraded automatically to Windows Server 2025 (KB5044284). This was observed in environments that use third-party products to manage the update of clients and servers. Please verify whether third-party update software in your environment is configured not to deploy feature updates. This scenario has been mitigated.
- An upgrade to Windows Server 2025 was offered via a message in a banner displayed on the device’s Windows Update page, under Settings. This message is intended for organizations that want to execute an in-place upgrade. This scenario has already been resolved.
The Windows Server 2025 feature update was released as an Optional update under the Upgrade Classification: “DeploymentAction=OptionalInstallation”. Feature update metadata must be interpreted as Optional and not Recommended by patch management tools.
We advise organizations to use Microsoft-recommended methods to deploy Windows Server feature updates.
Next steps: Microsoft is working with third-party providers to streamline best practices and recommended procedures. As an interim measure, Microsoft has also temporarily paused the upgrade offer via the Windows Update settings panel. We estimate it will be available in the first half of 2025. All other upgrading methods to install Windows Server 2025 are still available through the usual channels.
Once the offer via Windows Update resumes, IT administrators will be able to control the feature update offer banner by setting the target version to “hold” in the Group Policy “Select the target Feature Update version.” To learn how to manage feature updates via this group policy, see Manage Feature Updates with Group Policy on Windows Server.
Note: The Windows Server 2025 feature update was made available on November 1, 2024, as KB5044284, which was the same KB number used for Windows 11, version 24H2. This is the KB numbering for both client and server Windows updates. Future updates released for Windows Server 2025 and Windows 11, version 24H2 will share the same KB numbers, but will have different release note sites and links.
Affected platforms:
- Client: None
- Server: Windows Server 2025; Windows Server 2022; Windows Server 2019
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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