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

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

If you see a message like 'Your profile could not be opened correctly' or 'The profile appears to...

After installing a new program, you may open Command Prompt and see an error like '...' is ...

When you open Microsoft Store and see error 0x80072efd with the message "Connection refused," it ...

If Windows Search gives you a "connection refused" error, it usually means the firewall is blocki...

You open Command Prompt and see an error like "Invalid configuration" followed by a code...