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...

How to Clear SSH Known Hosts and Fix Host Key Verification Failed

Fix 'Windows Security Error: Virus Protection Turned Off'

You open Windows Security and see a red banner: “Virus & threat protection turned off.” This can ...

How to Reset Command Prompt Color and Font Settings

If your Command Prompt text is hard to read, colors look off, or the font has changed unexpectedl...

Fix Windows Search Permission Denied Error

You open the Start menu or File Explorer, type a search query, and get a 'Permission Denied' erro...

Fix PowerShell Assembly Cache Not Updating

You’ve updated a .NET assembly in the Global Assembly Cache (GAC) or copied a new DLL into a modu...