Microsoft recently released its first Windows 11 update of 2026, and it caused issues for some users. A fix has now arrived.
Microsoft has issued a fix for its Windows 11 January 2026 update, which caused several issues, including a bug that prevents older PCs from shutting down.
Among other reported issues are Remote Desktop Connections failing and Outlook Classic crashing.
The problems were caused by an update released on January 13th as part of the January 2026 Patch Tuesday.
After the update, some Windows 11 devices running version 23H2 were unable to shut down or restart.
While this issue seems rare, the other two problems are more common among users.
After installing the latest update, some users started having problems signing in through Remote Desktop connections from the Windows App.
Instead of logging in after clicking “connect,” users see their login attempt as an authentication failure.
WindowsLatest reports that the problem is related to the Windows App that sets the RDP connection. After the update, the Windows App could no longer execute the credential prompt, so the connection was then rejected.
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The company issued the fix on January 17th for all versions of Windows, including Windows 10, that run on Extended Security Updates (ESU).
The out-of-band updates are only offered via Microsoft Update Catalog, so users have to find the update ID and search for it on the Update Catalog.
The third bug related to the Windows 11 update affects Outlook: it fails to open with POP accounts. The company hasn’t provided a fix for this issue yet.
The reason behind Windows 11’s reboot failure
Microsoft has found a cause for these issues, which is related to the December 2025 security update, noted Susan Bradley at AskWoody (via Bleeping Computer).
Computers affected by these errors couldn’t install the December security updates, leaving them in an “improper state” after rolling back the update.
So if users tried to install Windows updates after this, their devices were unable to reset.
Bradley cited Microsoft, which states that it’s working on “a partial resolution that will prevent additional devices from resulting in a no-boot scenario if they try to install an update while in this improper state.”
The company also notes that this resolution “will not prevent devices from getting into the improper state in the first place, nor will it repair devices that are already unable to boot.”
Meanwhile, Microsoft is continuing to investigate why computers can’t install these Windows updates.
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