You can install Endless OS alongside with existing Windows system on your machine.
- Download the windows installer: here
- It's recommend to have around 16 to 32 GB free spacesure your main drive
- Click to open
- Follow the install screen
- Select the image type
- Choose the fixed space for Endless OS (cannot be changed later)
- Wait for the downloading and file installation
After installation finished, now every system reboot you should see a boot menu to chooose in between Windows and EOS.