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

How to Fix Nginx 502 Bad Gateway: A Practical Guide

Seeing a 502 Bad Gateway error from Nginx usually means the upstream server (like PHP-FPM, Gunico...

Fix 'err tunnel connection failed' on Chrome for Android

You open Chrome on your Android phone and instead of loading a page, you see 'err tunnel connecti...

Fix Windows Terminal Network Error 0x80070035

When you see error code 0x80070035 in Windows Terminal, it usually means the network path was not...

Windows Security DNS Error Troubleshooting Checklist

If you see a DNS error in Windows Security—like 'DNS resolution failed' or 'We can't connect to t...

Windows 11 Activation Fails After Hardware Change: Fixes

After upgrading your PC's motherboard, CPU, or hard drive, Windows 11 may show an activation erro...

PowerShell Command Not Found but Works in CMD