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

Stop systemd Service from Restarting in a Loop

If you have a systemd service that keeps restarting repeatedly — sometimes every few seconds — it...

Fix Windows Activation File Locked by Antivirus

If you see an error like “Windows activation file locked by antivirus” or activation repeatedly f...

How to Set Up Windows Defender for Low Memory Usage

If your system feels sluggish or you see high memory usage from Antimalware Service Executable (M...

Fix 'Port Already in Use' Error with No Visible Process

When you try to start a server or service on a specific port, you might see an error like "port a...

Fix Firefox Secure Connection Failed Certificate Errors

You try to open a website in Firefox and see a full-page error: "Secure Connection Failed" with a...

Fix 'Permission Denied' When Creating a Folder in Command Prompt