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

Fix Firefox Secure Connection Failed Error Due to Antivirus

You try to visit a website in Firefox and see a message like “Secure Connection Failed” or “PR_CO...

Cloudflare Wildcard Subdomain Cache Not Working: Fixes

If you use a wildcard DNS record like *.example.com proxied through Cloudflare, you ...

Docker Container Exits Immediately: How to Find Logs and Fix It

You start a Docker container and it stops within seconds. The status shows "Exited (0)" o...

Fix VSCode Git Authentication Failed: Reset Credentials

If you see a "Git authentication failed" error in Visual Studio Code, it usually means yo...

Cloudflare Origin Certificate Setup for Apache

If you use Cloudflare's proxy (orange cloud), you can set up an origin certificate to encrypt...

Fix Discord Black Screen from Chrome Hardware Acceleration

Why Chrome Hardware Acceleration Causes Discord Black Screen

When Chrome uses hardware a...