XDA Developers on MSN

Windows 11's January update is causing chaos with Outlook, and there's no fix yet

There are workarounds, though.
Windows Latest

Microsoft says uninstall Windows 11 KB5074109 to fix Outlook POP, PST hang, as 2026’s first update causes havoc

If your Outlook Classic freezes or hangs when you use POP accounts or deal with PST files, you'll need to remove Windows 11 ...
Windows Latest

Windows 11 KB5074109 issues: black screen, freezes Outlook POP, breaks Azure Virtual Desktop, LocalizedResourceName (desktop.ini)

Windows 11 KB5074109 causes a black screen on some PCs, including those with an Nvidia GPU, and also freezes Outlook if you ...