I did a clean install of windows 7 professional over the Windows Vista Home Premium that came on my laptop (a XPS M1530) and it appeared to go smoothly. Once the install was completed I was having trouble with viewing screen savers and playing games (that I had played many times on my computer...
clean install
coincidence
cput8300
dell support
diagnostics
failure
game issues
graphics card
hard drive
intel
matshita
nvidia
professional
screensaver
upgrade
wd drive
windows 7
windows vista
xps m1530