Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If files aren't syncing, icons are stuck, or you see error messages, this checklist walks you thr...

After a recent Windows update, you might see a '404 Not Found' error when trying to connect to a ...

After a Windows upgrade, you might see a '502 Bad Gateway' error when trying to activate. This us...

After a recent Windows update, you might notice Windows Defender (Microsoft Defender Antivirus) c...

You might see an error like “Windows activation dependency conflict” or “Activation failed due to...

If you're trying to activate Windows without an internet connection, the offline activation metho...