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

Fix Microsoft Store 404 Error on Windows 11

When you see a 404 error in the Microsoft Store on Windows 11, it usually means the store can't f...

How to Fix Windows Defender Not Turning On

Windows Defender (now called Microsoft Defender Antivirus) sometimes refuses to turn on or stay o...

How to View Windows Defender Logs in Event Viewer

If you suspect Windows Defender missed a threat or want to review past detections, the logs are s...

Windows Security for Ubuntu Installation Checklist

Before You Install Ubuntu

If you're dual-booting Windows and Ubuntu, or replacing Windows...

Fix Certbot Nginx Plugin SSL Certificate Renewal Failures

When the Certbot Nginx plugin fails to renew SSL certificates, you might see errors like ur...