a possible hit for you on a win7 upgrade,
http://ths.gardenweb.com/forums/load...503211270.html but read all the comments. i think it's supposed to be technically possible, but not advisable. i'd follow Prax advice, those are both good progs, and maybe just limit your surfing on that machine. i tried on a very similar(maybe even the same) tower w/o adding ram, and was disappointed