Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

After a Windows update, the Security app may refuse to open—clicking the icon does nothing, or it...

You're trying to delete a file in Windows, but you get an error saying the file is open in 'comma...

If Windows Search returns no results, shows outdated files, or takes too long, the search index m...

When you download a Microsoft Store offline installer (an .appxbundle or .msixbundle file) and tr...

If you see a 404 error when checking for Windows updates, it usually means the update files canno...

You open Windows Security and see the message 'Windows Defender service unavailable' or 'Windows ...