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...

Certbot Renewal Failed Due to Nginx Configuration: How to Fix

Fix Windows Activation Error 504 Caused by Firewall Settings

You try to activate Windows and get error 504. This often means your firewall is blocking communi...

Set Windows Update Service to Run as Local System Account

If Windows Update fails with errors like 0x80070422 or the service won't start, the service might...

Fix "Module Not Found" Error After Microsoft Teams Reinstall

If you recently reinstalled Microsoft Teams and now see a “module not found” error, it usually me...

Fix Microsoft Store Error 0x80131500: App Not Loading

If you see error code 0x80131500 when trying to open the Microsoft Store or download an app, the ...