Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Fix Windows Search Service Not Running

You open the Start menu or File Explorer to search for a file, and nothing happens — or you see a...

PowerShell Authentication Failed: Practical Fixes

You try to run a PowerShell command and get an authentication failed error. The message might say...

How to Stop and Restart Windows Update Service

If Windows Update is stuck downloading updates, keeps failing with error codes, or won't start at...

Fix Command Prompt Invalid Configuration Sync Error

When you see an "invalid configuration" error during a sync operation in Command Prompt, it usual...

MySQL Connection Refused Authentication Error Checklist

You're trying to connect to a MySQL server and you get one of these: ERROR 2003 (HY000): Ca...

Fix 'Port Already in Use' Error When No Process Shows
You try to launch Chrome or a Chrome-based tool (like Puppeteer, Selenium, or a local dev server)...