Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

After a recent Windows update, you might see an error like "Authentication failed" when trying to...

If you see error code 0x80131500 when trying to open the Microsoft Store or download an app, the ...

You try to install or update an app from the Microsoft Store on Windows 11, but it fails with an ...

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

You may see a 502 Bad Gateway error when using Windows Search, especially if you rely on web sear...

You've upgraded to Windows 11 and now need to install Outlook. This guide covers the main ways to...