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

Fix Nginx Upstream Connection Refused & Upstream Not Found

When you see upstream connection refused or upstream not found in your ...

Fix Windows 11 Bluetooth Not Connecting: Practical Steps

You try to connect a Bluetooth device—headphones, mouse, keyboard—but Windows 11 either doesn'...

How to Fix Taskbar Icons Not Loading on Startup

You boot your PC, but the taskbar icons—volume, network, battery, or pinned apps—don't show u...

Nginx Upstream Connection Refused: Fixing localhost Errors

You set up an nginx reverse proxy to forward requests to a backend service on localhost, but ngin...

Fix Git SSL Certificate Problem: Unable to Get Local Issuer Certificate

Fix Nginx 502 Bad Gateway with Docker Environment Variables

If you see a 502 Bad Gateway from nginx running in Docker, it usually means ngin...