
Windows Security Troubleshooting Checklist
If Windows security features aren't working as expected—like Windows Defender won't start, update...

If Windows security features aren't working as expected—like Windows Defender won't start, update...

If you suspect Windows Security (formerly Windows Defender) is not detecting threats, you might s...

If Windows Defender won't start or you see warnings that it's turned off, the underlying service ...

You open Windows Terminal, click on a profile—Command Prompt, PowerShell, or Ubuntu—and the tab j...

You install or update a Chrome extension, click its icon, and nothing happens—or you see a vague ...

If you open Windows Security and see 'Windows Defender Service not running' or it hangs on a load...