
How to Reset Windows Defender Settings
If Windows Defender (Microsoft Defender Antivirus) is acting up—won't open, shows error messages,...
Software troubleshooting desk

If Windows Defender (Microsoft Defender Antivirus) is acting up—won't open, shows error messages,...

After a Windows update, you might see "Access Denied" errors when trying to open Windows Security...

You see a message like "Profile version mismatch" in Chrome and your bookmarks, ...

If you see a '502 Bad Gateway' error when running Windows Update, the problem is often on the net...

You launch Windows Defender Security Center or try to run a scan, and you see a proxy error—somet...

If you're running Windows Defender on a Mac via virtualization or Boot Camp, you may run into iss...