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

Fix Windows Security High CPU Usage on Windows 10

If your Windows 10 PC is running slow and Task Manager shows Windows Security (or Antimalware Ser...

How to Fix Command Prompt Not Opening in Windows 11

You click Command Prompt but nothing happens. The window doesn't appear, or it flashes and closes...

Fix Nginx 502 Bad Gateway Behind Cloudflare

If you're seeing a 502 Bad Gateway error on a site that uses both Nginx and Clou...

Docker Container Restarting Due to Health Check: Causes and Fixes

PowerShell Not Working on Mac: Common Fixes

If PowerShell fails to launch on your Mac or throws errors after startup, the problem is usually ...

SSH Permission Denied (Publickey) on EC2: Setup Fixes

If you're seeing "Permission denied (publickey)" when trying to SSH into an AWS EC2 instance, the...