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Microsoft Investigates Outlook Freezing Issue After Windows 11 Update

Microsoft is investigating reports of Outlook freezing after a Windows 11 security update. Learn more about the issue and potential risks.
16 January 2026 by
TechStora Editorial Board

Outlook Freezing Issue

Microsoft is looking into reports that a January Windows 11 security update is causing the classic Outlook desktop client to freeze and hang for users with POP email accounts.

What is POP?

POP (Post Office Protocol) is a way to download emails from a server to a local device. While it's not as widely used as IMAP or Exchange, it's still popular among home users and small businesses.

Microsoft said, investigators are still learning about the issue and will update its advisory as more information becomes available.

Potential Risks

Removing security updates may leave Windows devices exposed to malware and other threats, as they patch vulnerabilities that are often already being exploited in attacks.

  • Microsoft's Outlook and Windows teams are investigating the problem.
  • No timeline for a fix or workaround has been provided yet.