Knowledge base for software setup, errors, and daily tool work.

How to Fix Windows 11 Update Stuck at 0 Percent

You click Check for updates, and the progress bar sits at 0% for minutes or hours. This is a comm...

How to Fix Firefox Secure Connection Failed Certificate Error

You see a full-page error in Firefox: Secure Connection Failed with a message li...

Fixing Nginx Permission Denied for Root Directory

You've set up a new Nginx server block, pointed the root directive to a directory, and when y...

Fix Nginx 502 Bad Gateway on Docker Ubuntu

Docker Compose Port Already Allocated: Checklist

You run docker-compose up and get an error like Error starting userland proxy:...