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 11 KB5074109 causes Outlook freezing for POP accounts. Microsoft confirms the issue and investigates a permanent fix.
Microsoft confirmed that the KB5074109 January Windows 11 security update causes the classic Outlook desktop client to freeze ...
Microsoft shares workarounds for a Windows 11 KB5074109 bug that breaks Outlook for POP email accounts and PST files.
Microsoft's January security updates for Windows 11 also appear to be disrupting Outlook. Microsoft is investigating problems ...
Microsoft has issued guidance to uninstall KB5074109 security update or switch to webmail after the patch caused Outlook ...
A widespread issue has emerged in classic Microsoft® Outlook following the Windows 11 patch update KB5074109 on 13 Jan, 2026. POP account users have reported that Outlook is unable to exit cleanly.
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