To restore Tabs in File Explorer after Restart in Windows 11, enable the 'Restore previous folder windows at logon' setting in Folder Options.

Undelete files via Windows built-in app If you don’t want to install any file recovery software on your computer, Windows has a built-in app for data recovery.

Perform System Restore At times, a faulty Windows update, a rogue app, or unwanted system changes can cause your Start menu to disappear unexpectedly.