The safest way to test Winnux is to run it from a USB stick without installing. No risk to your existing Windows installation.
Download the Winnux ISO from the download page. Choose the right variant for your graphics card:
You need a USB stick of at least 8 GB. Use a tool like Rufus (Windows) or dd (Linux):
# On Linux/Mac:
sudo dd if=winnux-0.1.iso of=/dev/sdX bs=4M status=progress
sync
Replace /dev/sdX with your USB stick device name. Be careful to choose the right device — the wrong one can erase data.
Once Winnux has booted, open Winnux Hardware to check:
You can now use Winnux as if it were installed. Test the desktop, install apps via Store, try games. Nothing is saved when you shut down.