Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Fix Windows Security Proxy Error After Update

After a Windows update, you might see a proxy error in Windows Security (formerly Windows Defende...

Fix Windows Terminal Version Mismatch Errors

You launch Windows Terminal and see an error about a version mismatch—perhaps between the termina...

Fix Windows Activation 502 Bad Gateway Due to Proxy Settings

If you see a "502 Bad Gateway" error when trying to activate Windows, the problem is often a misc...

Microsoft Store 504 Error: Beginner's Troubleshooting Checklist

You open the Microsoft Store and instead of apps, you see a 504 error. This usually means the sto...

Fix ERR_CONNECTION_RESET After Network Change in Chrome

You switch Wi-Fi networks or reconnect a VPN, and suddenly Chrome shows ERR_CONNECTION_RE...

Fix Windows Defender Failed to Start: Registry Repair Steps
When you see “Windows Defender failed to start” or “Windows Defender service terminated unexpecte...