Hello everyone!I'm currently using Windows XP on a stone age PC.I'll get a new rig in March and I'm confused which OS to get.I hear HSA and Mantle may only work with Win8 and if I go for the processors that support it,I'll get Win8.Can anyone tell me if I can use this for multiple fresh installs?:http://www.flipkart.com/microsoft-windows-8-upgrade-pack-32-64-bit/p/itmdgph7qfbzxygz?pid=OPSDGPKBMYYFNCP7&ref=9dd18afe-7128-4ea2-b2be-04491abb5845 And I want to play some old games like Splinter Cell:Chaos theory.How doI get them to run on 8?