Microsoft confirmed that the KB5074109 January Windows 11 security update causes the classic Outlook desktop client to freeze ...
There are workarounds, though.
Windows 11 KB5078127 is an 'out-of-band' patch to fix an issue that broke Outlook Classic (POP, PST) after January 2026 Patch ...
Microsoft shared a temporary workaround for customers experiencing Outlook freezes after installing this month's Windows ...
Microsoft issued another out-of-band update to fix a bug that caused Outlook to crash for Windows 11 users. This second ...
January's Windows 11 update rendered classic Outlook unusable for many users. While Microsoft works on a fix, they've ...
Microsoft is telling Windows 11 users to do something it almost never recommends: roll back a critical security update if ...
Microsoft has released a second emergency, out-of-band update for Windows 11, this time to address crashes and instability affecting Outlook following the company’s January 2026 security updates.