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

How to Fix Windows Defender Blank Screen Issue

If you open Windows Defender (now called Windows Security) and see only a blank white or black sc...

GitHub Actions Runner Not Connecting: Fixes That Work

You've set up a self-hosted GitHub Actions runner, but it never appears online or shows a "runner...

Fix Microsoft Store Error by Changing DNS Settings

If the Microsoft Store won't load, shows error 0x80131500, or fails to download apps, a DNS issue...

Fix Windows Defender Access Denied in Safe Mode

You may see an 'Access Denied' error when trying to open Windows Defender in Safe Mode. This typi...

Fix 'Remote Desktop Command Not Found' in Linux