
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...

When Windows Update shows “cannot connect to update server,” you may see error codes like 0x80072...

You open Windows Terminal and get a version mismatch error—or something just doesn't work the sam...

After a Chrome update, you might see an 'Access Denied' error when trying to visit certain websit...

If Windows Defender is disabled on your system—perhaps after installing third-party antivirus or ...

You notice your system is sluggish, and Task Manager shows Windows Defender Antivirus Service usi...