Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

Error 0x80072efd usually appears when Windows Update can't connect to Microsoft servers. It often...

If you see "Windows Defender service not running" or a red warning in Security Center, the underl...

When Windows Defender offline scan fails to start or complete on Windows 10, you might see an err...

You open Windows Security and get error 0x80070422, or see a message that the app can't start. Th...

If you're seeing 'permission denied' when searching for Windows files on your Mac, it's usually b...

If OneDrive shows 'Processing changes' for longer than a few minutes, your files aren't syncing. ...