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

Fixing Cloudflare 521 Error with Nginx Configuration

The Cloudflare 521 error indicates that your web server is refusing connections. This usually mea...

Fix Windows Defender Dependency Conflict in Windows 10

You may see an error like "Windows Defender can't start because a dependency service is not runni...

Fix CMD Service Unavailable Due to Group Policy

Situation

You open Command Prompt and see an error like "Command Prompt has been disabled...

Fixing Nginx 404 Errors for API Endpoints

When your API returns a 404 error from Nginx but works locally, the problem is usually in the Ngi...

Windows Defender Stuck Loading: How to Fix

You click Windows Security, and it just sits there spinning, never opening. This is a common frus...

Fix OneDrive High CPU Usage on Windows 11

If OneDrive is using 20% or more of your CPU on Windows 11, it's usually due to a stuck sync, cor...