In my experience upgrade installs lead to more issues, I would rather do a fresh install. It is just slower than I would like, Certain games such as sc2 and fall out 3 see dramatic fps drops even with my 6950, Also typing this message lol i can type faster than the computer itself can keep up. I thought failing hardrive but tested that with seatools and hdat both come up clean, I have though memory but am not getting any bsods and have also ran mem test. Prehaps I need more RAM. THis install is going on three years old so perhaps it is time for a fresh install. I have also checked for virii and malware. Which came up clean.