I haven't had any problems running Windows XP Professional Edition on my computer in the last year and a half. None that the operating system itself was really responsible for. I've had viral infections and hard drive failures and bad drivers, but none of that is XP's fault. Sorry you had such problems on your "100" computers, I haven't had any with the "8" that I've dealt with. As for the RAM-hogginess, just get more RAM. Does wonders for Poser. ^_^ My computer (an XP Pro system running with 1.25 gigs of SDRAM) is home to several viral infections out and about today. None of them are active, as my PC-Cillin has already disabled each and every one, but they still exist. You may ask yourself, WHY ARE THE VIRII STILL ON YOUR SYSTEM?!?! Simple answer, because they can't do anything anymore. Disabling the virus' ability TO activate goes a long way towards having any viral outbreaks.