
Fix Windows Defender Access Denied Error on Startup
If you see 'Windows Defender failed to start access denied' when you open Windows Security or aft...
Software troubleshooting desk

If you see 'Windows Defender failed to start access denied' when you open Windows Security or aft...

If you see errors like "security token expired" or "access denied" on a domain-joined Windows mac...

After a Windows update, the Microsoft Store may fail to open—clicking the icon does nothing, or i...

If you see a "task scheduler version mismatch" error when trying to import or run a scheduled tas...

If your search history, recent files, or settings aren't syncing between your Windows devices, it...

After a Windows update, some users find that Windows Defender is missing from the system tray, Se...