Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see a 502 Bad Gateway error while using command prompt—for instance when ...

Setting up Outlook for Mac can be straightforward, but small missteps cause frustrating sync or a...

If you're seeing a 404 error in Microsoft Teams—often when trying to open a file, channel, or tab...

You click download in the Microsoft Store, but the progress bar barely moves or stays at 0%. This...

If you see 'Chrome profile service unavailable' on your Mac, Chrome won't let you sign in or sync...

After a Microsoft Teams update, you might see a "connection refused" error when trying to sign in...