Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If Windows Search shows a 504 Gateway Timeout error, the search indexer or a dependent service is...

You launch Windows Defender Security Center or try to run a scan, and you see a proxy error—somet...

Outlook displays a connection timeout error when it cannot reach the mail server within a set per...

You enter your username and password, click Connect, and get: "Your credentials did not work." Or...

You open Microsoft Store, and it hangs on a spinning circle or shows a timeout error. This usuall...

If Outlook is crashing, failing to send email, or showing sync errors, enabling log files can hel...