For everyone else, though, you'll need to use Microsoft's automated tool to see whether it can fix the issue or manually try some troubleshooting methods outlined in a support document.

Microsoft’s Inbox Repair tool can solve certain problems with your Outlook file. Find out how you can fix issues that may arise from a corrupt personal folder file.

Learn how to repair Microsoft 365 using Command Prompt in Windows 11/10 if you're unable to do so via the Programs & Features applet.

Windows doesn't tell you which program is using a file and prevents you from renaming, moving, or deleting a file while it is in use.