If I get something like this http://www.ebay.co.uk/itm/WINDOWS-8-1-64-BIT-RE-INSTALL-DISC-DVD/121443692461?_trksid=p5197.c100068.m2280&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20140205155511%26meid%3Dfa38dda67c70420aaad3b0a4cede0165%26pid%3D100068%26prg%3D20140205155511%26rkt%3D6%26clkid%3D874247282214777291&_qi=RTM1793643
Does that mean all I will need is a windows product key and I can install It?
Thanks