If you have so many M$ machines to fall back on,
& if you are prepared to "do it all",
( make sure that the BIOS is set to boot the cd 1st)
then reboot the thing with the live_cd in that drive,
& click on the Install icon, & when the partitioner get to the bit about where to install,
select the option to install to the Whole HDD - generally the 1st option.
& let it erase Everything on the HDD & install the 'nix.