
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 "Authentication failed" when opening Windows Defender or trying to run a scan, it usua...

You run telnet in Command Prompt and get a connection timeout error. T...

If Windows Defender keeps crashing and restarting on your Windows 10 PC—showing error messages, d...

You try to connect to a remote PC and get an error like “This computer can’t connect to the remot...

You try to open a folder on Windows, and you see 'You have been denied permission to access this ...