Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

How to Reinstall Windows Defender in Windows 10

Windows Defender (now called Microsoft Defender Antivirus) is built into Windows 10 and typically...

Fix Chrome Blank Screen When Switching Profiles

If Chrome shows a blank screen (white or grey) after you switch user profiles, you're not alone. ...

Windows Security Version Mismatch: Troubleshooting Checklist

If you see an error message saying Windows Security has a version mismatch, or the Security Cente...

Fix Windows Defender Authentication Failed Error in Windows 10

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

MySQL Access Denied: Database User Permission Checklist

When you see ERROR 1045 (28000): Access denied for user 'username'@'hostname' (using passwo...

Fix Windows Defender Version Mismatch Sync Errors
You see a message that Windows Defender definitions are out of sync, or that the client and serve...