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

Fix Windows Defender Real-Time Protection Not Starting

If you see a yellow warning or a message that real-time protection is off, Windows Defender’s cor...

How to Create a Docker Network If Not Found

When you run a Docker container and get an error like network not found, it means th...

Git Push Rejected Non Fast Forward: Troubleshooting Checklist

How to Fix Nginx 'Upstream Connection Refused' Error

When Nginx returns a 502 Bad Gateway with upstream connection refused in the error l...