Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If Outlook crashes repeatedly—freezing, closing without warning, or throwing errors—this checklis...

You try to sign in to Microsoft Teams and get an error saying the configuration is invalid. The a...

You see "Windows isn't activated" or "We can't activate Windows on this device" even though you h...

After a Chrome update, some users encounter a 502 Bad Gateway error when trying to visit websites...

If you see a "502 Bad Gateway" error when running Windows Update, it often points to a problem wi...

Chrome can suddenly stop working—pages won't load, the browser crashes, or it runs slowly. This c...