Checklists for software errors, setup, and tool workflows.

Fixing Nginx 502 Bad Gateway in Docker Networks

You have an Nginx container proxying requests to another container (like a PHP-FPM or Node app), ...

Fix Git 'index.lock file exists' Error

If you see fatal: Unable to create 'path/.git/index.lock': File exists. when...

Fix Windows Explorer Restarting from Corrupted System Files

If Windows Explorer keeps restarting unexpectedly, corrupted system files are a common cause. Thi...

Fix 'git pull failed index.lock file exists' Error

When running git pull, you may see an error like:

fatal: Unable to create &#...

Windows 11 Update Stuck at 0%? Here's How to Fix It

You click "Check for updates" and see the download sitting at 0% for minutes or hours. Th...

Windows Defender Real-Time Protection Greyed Out: How to Fix

If you open Windows Security and see the real-time protection toggle greyed out, you can't tu...