Windows 11’s latest update drama: KB5074109 breaks things, and the uninstall process breaks too.

What is Microsoft 365 451 4.3.2 Temporary Server Error and how to fix it? Microsoft 365 faced outages affecting Outlook, Teams, Defender, and Purview. Users reported over 11,000 issues. The error indicates server-side problems.

REDMOND, Wash. – Microsoft said many of its popular tools had problems for users across North America on Thursday, causing email and chat services to stop working for hours. The company’s Outlook and Teams apps were difficult to use for thousands of people.

Microsoft 365 services including Outlook, Microsoft Defender and Microsoft Purview were impacted on Thursday, with the company issuing an update on the matter.

Microsoft released an out-of-band update Friday to resolve credential authentication failures affecting Azure Virtual Desktop and Windows 365 connections that emerged after the company's January 2026 security update.

Microsoft has confirmed that the Windows 11 January 2026 Update is causing at least three major issues, rolling out fixes for two bugs.

Microsoft shared a temporary workaround for customers experiencing Outlook freezes after installing this month's Windows security updates.

Microsoft rolled out the latest cumulative updates for Windows on January 13, 2026. Soon after installing the patches, users began reporting erratic behavior on both home

Microsoft delivers a fix for the Windows 11 issue that prevented PCs from shutting down after installing a security update.