Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you're seeing a 404 error in Microsoft Teams—often when opening a link or launching the app—it...

When Microsoft Teams shows a 'connection refused' error, you can't sign in or use the app. This u...

When you try to install or update an app from the Microsoft Store, you may see an error about a d...

Seeing 'ERR_CONNECTION_REFUSED' in Chrome usually means the browser tried to reach a server but g...

You try to open, edit, or delete a file and get an error like File locked by Windows Defend...

Fix Outlook Dependency Conflict After Update
After a recent Office or Windows update, Outlook may fail to start or show errors about a missing...