
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 a 'module not found' error when launching Windows Terminal, the app may have a corrupt...

When you see error code 0x80070005 while trying to install or update an app from the Microsoft St...

When Command Prompt fails to start with an error referencing corrupted system files, it usually m...

When you open Windows Security (formerly Windows Defender Security Center) and see a 504 ...

You right-click Command Prompt, select 'Run as administrator', and get an 'Access denied' or 'Per...