Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

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

If you manage multiple Windows devices and notice that update settings or installed updates don't...

You open Microsoft Store and see an SSL certificate error—maybe “ERR_CERT_AUTHORITY_INVALID” or a...

If you see a '404 Not Found' error when opening Windows Security (formerly Windows Defender), the...

If you're running a small business on Windows, you can rely on the built-in Windows Security (for...

You're trying to download an app or update from the Microsoft Store, but you get an error about r...