No specific problems, its my first time using an NT OS, so there are plenty of things I like about it, but I'm the kind of person who wants to make sure I've got my drivers and such the best they can be. So, I'm curious about a new service pack because I'm getting tired of trying to get every little security, ide busmaster or 3-D graphics driver to improve my performance...Detonators 4s will probably help, and hopefully VIA will get some better IDE busmaster drivers for my Epox 8k7a+, but I just interested in the 2K SP3 to offer more compatibility...