
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...

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

You click the Windows Security icon in the taskbar or try to open it from Settings, but nothing h...

You try to connect to another computer on your local network via Remote Desktop (RDP) and get a t...

You open Outlook, try to send or receive email, and get an authentication failed error. The progr...

When you try to edit the Windows Terminal settings file (settings.json) and get a "p...

When you plug in a BitLocker-encrypted drive and see "permission denied" or "access denied" inste...