Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You try to activate Windows and get error 0x80070002. The message often says something like “depe...

You see OneDrive error 0x8004de40 with the message "Connection refused." This often happens when ...

After a Windows update, you might see an error that activation servers can't be reached—often phr...

If you see repeated credential prompts or Windows Security not saving settings, a cache sync issu...

If you see a '502 Bad Gateway' error when opening Microsoft Store on Windows 11, the store can't ...

After a system update, you might find that a custom or third-party service fails to start. This i...