Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see error 0x80040c41 when searching in Windows, the indexing service is likely stuck due t...

You're running the Windows 11 Installation Assistant, it reaches 99%, and then sits there. No...

If you see connect() failed (111: Connection refused) or connect() failed (13:...

Firefox Secure Connection Failed Only on WiFi: Fixes
If Firefox shows a "Secure Connection Failed" error only when you're on WiFi—but the ...

Fix Nginx 502 Bad Gateway: Upstream Connection Refused
If you're seeing a 502 Bad Gateway error with "upstream connection refused" in your N...

Fix Windows 11 Update Stuck at 0% – BITS Service Issues
You click 'Check for updates' in Windows 11, and it sits at 0% for minutes or hours. Ofte...