The latest KB5074109 update for Windows 11 causes the classic Outlook app to crash and lose emails, and there’s a risk of data loss if PST or OST files are stored on cloud-backed storage! You can read ...

There are workarounds, though.

Now, Neowin reports that several users are saying the latest Windows 11 update ( KB5074109) has made classic Outlook ...

Microsoft admits that “Classic Outlook profiles with POP accounts and PSTs hang after Windows updates on January 13, 2026.” If you’re affected, you need to await a fix. “The Windows Team will be ...

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

While millions await permanent resolution from Microsoft, Stellar Repair for Outlook is helping hundreds of users remedy the situation by offering an immediate and proven solution. This powerful yet ...

If your Outlook Classic freezes or hangs when you use POP accounts or deal with PST files, you'll need to remove Windows 11 ...

Windows 11 KB5078127 is an 'out-of-band' patch to fix an issue that broke Outlook Classic (POP, PST) after January 2026 Patch ...

Archiving (automatic or manual) in Microsoft Outlook helps you to enhance applications’ performance and optimize storage by moving older emails and other items to a separate (archive) PST file. It ...

What is a PST File? The PST File of Microsoft Outlook is a useful application that allows the storage of Outlook emails for both received and sent emails in the hard drive of the computer.

Correct problems with Microsoft Outlook by repairing your Microsoft Outlook Data File -- known as a PST file. If you're having problems opening or accessing your Outlook data, then you can scan your ...

If you want to open the Outlook PST file on Windows 11/10 but you do not know the location, here is everything you should know about. This tutorial helps you find the Outlook PST file, learn how to ...