Run Games on XP. there are still lots of problems with running games on vista. i used Vista ultimate and it uses so much of your ram that games will run slower. well more demanding ones anyways. for eg. i could run Quake 4 on ultimate graphics on xp no lagg. on vista, its coppy and real laggy. lolz. you could close the explorer.exe and that would cut down alot of ram usage. then u just start the explorer.exe task again laterz. anyways, stick to XP for games, i had to learn the hard way. now im puttin XP back on my system. yay....