As you have nothing to lose: On another PC download the official MS Media Tools: https://www.microsoft.com/en-us/software-download/windows10 Download the correct W10 version (Home) and create a bootable USB key (the tool handles this). This will be the Creator version, do not worry. Set the bios of the Minix to boot on the usb first. Plug it in. Boot. During the installation process, you will have the opportunity to wipe all existing partition. Do it. The installer will recreate everything, with the correct, default size. Once W10 is installed, you will have to install all Z83-4 drivers. There is a dedicated thread about this. Basically: download, extract everything, right click->install every .INF you will find.