
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 rate limit error in Windows Defender (Microsoft Defender Antivirus) that appears aft...

If Windows Defender keeps asking you to sign in repeatedly—even in Safe Mode—the problem is usual...

If Chrome is crashing, loading pages slowly, or behaving oddly—like showing unexpected pop-ups or...

When you open the Windows Update log and see 'log file not found' or get this error in Event View...

If you type a file name into the Windows Search box and nothing shows up, or results are missing ...