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...

You try to open a file in OneDrive and see a 404 Not Found message, or you get an Access Denied e...

You're trying to access a BitLocker-encrypted drive, but you get a "permission denied" error. Thi...

If you notice that Windows Security (formerly Windows Defender) is using a lot of memory—sometime...

You try to send or receive email in Outlook, but it says it cannot connect to the server. Usually...

You might need to reset Windows Defender (now Microsoft Defender Antivirus) to its default settin...