To install Win 10, there are several ways
- Upgrade from Windows 8, from you screen shot I can see Win 8 install, so you can just upgrade
- You can download the Win 10 zip files from http://x86pad.com/resource.html
Be sure to make a backup or not?
Well, if you have any files you want to keep yes. Even if you are upgrading, you should back up personal files on a USB.
The installation process is the same as on regular computers?
The windows zip files is a little different. You just have to select it from multi boot menu and it will do the rest.
ideal Mini PC?
If you don't mind spending money, you can get an Intel NUC.