Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If Microsoft Edge fails to launch—clicking the icon does nothing, or the window appears briefly a...

After a Chrome update, you might find your profile—bookmarks, history, passwords, extensions—seem...

You open Windows Security, try to run a scan, or enable real-time protection, and get a message l...

If you see an error like fatal: unable to access 'https://...': SSL certificate problem: un...

Fix Chrome Port Already Allocated Error (ERR_UNSAFE_PORT)
When Chrome displays an error like ERR_UNSAFE_PORT or a message that a port is alrea...

Fix OneDrive 502 Bad Gateway Permission Denied Error
If you see a 502 Bad Gateway or Permission Denied error when us...