Windows 11 Update Causes Outlook Freezes for POP Users

Windows 11 Update Causes Outlook Freezes for POP Users

First seen 21 Jan 2026, 06:39 UTC BleepingcomputerHeise.DeTheregisterPetri 20.3

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A January security update for Windows 11, specifically update KB5074109, is causing the Outlook desktop client to freeze for users with POP email accounts. Microsoft has acknowledged the issue and is currently investigating the widespread reports from affected users.