Microsoft's January security updates for Windows 11 also appear to be disrupting Outlook. Microsoft is investigating problems with POP mail accounts.

Windows 11 KB5074109 causes Outlook freezing for POP accounts. Microsoft confirms the issue and investigates a permanent fix.

Microsoft is investigating a Windows 11 regression that is causing classic Outlook to hang, lag, or become unresponsive after the January 13, 2026 cumulative update (KB5074109).

Windows 11 KB5074109 causes a black screen on some PCs, including those with an Nvidia GPU, and also freezes Outlook if you use POP.

Windows 11 Patch Tuesday updates for 24H2 and 25H2 reportedly break classic Outlook, causing freezes, hangs, and lost email drafts.

If you're having problems with Microsoft Outlook, don't worry, you're not alone. A heat map on the website Downdetector — which provides a real-time overview of issues and outages of services — showed that a number of markets across the United States ...

Several thousand Microsoft Outlook users ran into issues with the email platform Wednesday night and Thursday morning, with some reporting problems like loading their inboxes or signing in. Microsoft 365‘s status page first said that it was investigating ...

Microsoft is looking into a newly identified issue in classic Outlook that prevents users from opening certain encrypted emails following a recent