MS reveals why Windows 11 says a file is in use after closing app, plus the fix

3 hours ago

The 'file in use' error in Windows occurs because a file handle remains open, preventing deletion or renaming due to potential data corruption.
Common reasons for lingering file handles include antivirus scanning, remote network access, and DLL memory mapping, which may persist even after closing an app.
Tools like Handle (command-line) and Process Explorer (graphical) can identify processes holding file handles, with Sysinternals utilities integrated into PowerToys for easier access via File Locksmith.
A workaround suggested by Microsoft is renaming the locked file, placing a new version with the original name, and deleting the old copy once released.

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