Windows 11 Update KB5074109 Causes Outlook Freezes for POP Users

Timeline

1. 16.01.2026 14:12 1 articles · 12h ago

   Windows 11 Update KB5074109 Causes Outlook Freezes for POP Users

   Microsoft is investigating reports that the January Windows 11 security update KB5074109 causes the classic Outlook desktop client to freeze and hang for users with POP email accounts. The issue affects users who have installed the update on Windows 11 25H2 and 24H2, preventing Outlook from exiting properly and restarting after being closed. Users can temporarily resolve the issue by uninstalling the KB5074109 update.

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   • Microsoft: Windows 11 update causes Outlook freezes for POP users — www.bleepingcomputer.com — 16.01.2026 14:12

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Information Snippets

• The issue affects users who have installed the KB5074109 security update for Windows 11 25H2 and 24H2.

  First reported: 16.01.2026 14:12
  1 source, 1 article
  Show sources

  • Microsoft: Windows 11 update causes Outlook freezes for POP users — www.bleepingcomputer.com — 16.01.2026 14:12

• POP (Post Office Protocol) is an email retrieval protocol used for downloading emails from a server to a local device.

  First reported: 16.01.2026 14:12
  1 source, 1 article
  Show sources

  • Microsoft: Windows 11 update causes Outlook freezes for POP users — www.bleepingcomputer.com — 16.01.2026 14:12

• Microsoft's Outlook and Windows teams are investigating the problem but have not provided a timeline for a fix or workaround.

  First reported: 16.01.2026 14:12
  1 source, 1 article
  Show sources

  • Microsoft: Windows 11 update causes Outlook freezes for POP users — www.bleepingcomputer.com — 16.01.2026 14:12

• Affected users can uninstall the KB5074109 update to resolve the issue temporarily.

  First reported: 16.01.2026 14:12
  1 source, 1 article
  Show sources

  • Microsoft: Windows 11 update causes Outlook freezes for POP users — www.bleepingcomputer.com — 16.01.2026 14:12