
Fix Windows Defender Can't Connect After Update
After a Windows update, you might see an error that Windows Defender can't connect to the service...
Software troubleshooting desk

After a Windows update, you might see an error that Windows Defender can't connect to the service...

If you see a 502 Bad Gateway or Permission Denied error when us...

You see a message like 'Windows Defender Authentication Failed' when trying to open or update Win...

You try to activate Windows, but get an error: "Windows activation port already allocated on ...

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

When Chrome shows "Profile service unavailable" and won't load your profile, it usually means the...