Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see error 0x80070002 when checking for updates, Windows is likely missing a file it needs....

If you see an error like "The port is already allocated" when trying to install or updat...

You click the Microsoft Store icon in the Start Menu, but nothing happens—no window, no error. Th...

If you're seeing a '502 Bad Gateway' error when opening Windows Defender, it usually means a netw...

You open Chrome and see a message like "Token expired" or "Authentication token expired" before t...

You try to open a file on your laptop but it's not there. Or you save a document on your desktop ...