Gayer than XP worked just fine... Vista sux, but this is a new laptop and it shipped with Vista.. I couldn't get it with XP, and I'm too lazy to downgrade it. 
gayer than me having a super light weight version Of XP that only uses 29 mB of ram to run one internet explorer program...It works on all computers and you can make upgrades...About 340% faster than regular windows Xp..I can send out copies to all team gayer than members,,