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

Fix Windows Update Failed to Start After Reboot

You’ve just restarted your PC after installing updates, but Windows Update won’t start. The updat...

Windows Security for Ubuntu Installation Checklist

Before You Install Ubuntu

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

Fix Windows Security Offline Installer Stuck Issues

You download the Windows Security offline installer (the .cab or .psf file) to update Defender de...

Fix Docker Container Exit Code 1 Permission Denied

You start a Docker container, and it exits immediately with exit code 1. The logs show "permissio...

Fix VirtualBox Kernel Driver Not Installed on Ubuntu

When you try to start a virtual machine in VirtualBox on Ubuntu and see the error 'Kernel driver ...

Fix Cloudflare DNS Not Working on Router Setup

If you've set Cloudflare DNS (1.1.1.1, 1.0.0.1) on your router but devices still can't resolve do...