Checklists for software errors, setup, and tool workflows.

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Fix git index.lock File Exists Error on Windows

If you see fatal: Unable to create 'index.lock': File exists. when running G...

Fixing Nginx Permission Denied on Mounted Drive

When you mount an external drive and point Nginx to serve files from it, you may get a 403 Forbid...

Fix Nginx 502 Bad Gateway Docker Permission Denied

When running Nginx as a reverse proxy in a Docker environment, a 502 Bad Gateway error often poin...

Fix Windows Defender Error 0x800704ec: Real-Time Protection

If you see error code 0x800704ec when turning on Windows Defender real-time protection, the servi...

Fix 'git remote add origin already exists' Error

When you run git remote add origin <url> and see fatal: remote origin al...

Fix Windows 11 Update Stuck at 0% with Clean Boot
You start a Windows Update, but it sits at 0% for minutes or hours. This can happen after a faile...