
Windows Defender Service Troubleshooting Checklist
If Windows Defender won't start, won't update, or shows error messages like "Service stopped" or ...
Software troubleshooting desk

If Windows Defender won't start, won't update, or shows error messages like "Service stopped" or ...

If you see "TLS Error: TLS handshake failed" in your OpenVPN client log, the connection cannot es...

If your Windows 10 PC slows down, fans spin up, and Task Manager shows high CPU usage from 'Windo...

You installed software offline, and now Task Scheduler tasks that worked before show 'permissions...

You installed a new antivirus program, and now Windows Update won't run. The service might be dis...

You open OneDrive and see "Connection refused" or "Cannot connect" errors. Often this is because ...