Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see an error like “You’ve reached the limit for sending email” or “Try again later” when s...

You might see errors like 'The information store could not be opened' or 'Your Microsoft Exchange...

If your Windows Search stops finding Outlook emails, appointments, or contacts, the search indexe...

After a Windows update, you might find that Windows Defender (Microsoft Defender Antivirus) is di...

If Windows Security (formerly Windows Defender) has disappeared from your Start Menu, it usually ...

If Windows Defender shows “Loading Group Policy Configuration” and never finishes, the security c...