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

Fix Windows Security Authentication Failed Smart Card Not Working

You insert your smart card, enter your PIN, and Windows Security reports “Authentication failed.”...

Fix Microsoft Store High CPU Usage & Error 0x80073cf0

You open the Microsoft Store, and your CPU fan spins up. Task Manager shows Store using 30-50% CP...

Windows Terminal Backup & Restore Checklist

After customizing Windows Terminal with profiles, color schemes, and key bindings, losing those s...

Windows Activation Error Troubleshooting Checklist: Step-by-Step

Common Activation Error Types

Windows activation errors usually appear as a watermark on ...

Docker Compose Build No Cache Checklist: Step-by-Step

When You Need a Clean Build

If you notice your Docker Compose services are not picking u...

Fix Jupyter Notebook Token Not Working on Windows

When you start Jupyter Notebook (or JupyterLab) on Windows, it often opens a browser tab asking f...