Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You double-click Command Prompt, the window appears briefly, then vanishes — or it just hangs wit...

When Windows Update downloads crawl, it's usually not your internet connection. Here are practica...

After a Windows update, you might see an error like “Search is not working” or “Invalid configura...

If you're seeing a 404 Not Found error when trying to open Outlook on the web (formerly Outlook W...

If you've disabled Cortana and find that Windows Search no longer returns results or runs slowly,...

You might see sync errors like 'dependency service or group failed to start' or 'Windows Security...