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

Nginx 502 Bad Gateway: PHP-FPM Fix Guide

Seeing a 502 Bad Gateway error from Nginx usually means it can't reach PHP-FPM. This is common af...

WireGuard Handshake Failure: Configuration Check Guide

You've set up WireGuard, but the handshake keeps failing. The tunnel won't establish, and you see...

Fix Windows Activation Error 0xc004c003 Without Internet

You see error 0xc004c003 when trying to activate Windows, and your device either has no internet ...

Fix Docker Pull Denied Error 403: Practical Steps

You run docker pull and get a 403 denied error. This usually means authentication or...

Windows Defender Troubleshooting Checklist

Windows Defender (now Microsoft Defender Antivirus) usually runs quietly in the background, but s...

Fix npm install ENOENT package.json Setup Error