PADSHOP - CUBASE 5 - WIN XP

I just downloaded the update for Cubase 6.5 from Cubase 6.06 which I currently use on my Windows XP OS. It continually crashes when I hit setup. I have no idea why. I tried to run it as administrator, etc etc…i see others using it and wondered if perhaps anyone had any knowledge to this issue? Thanks, any feedback is appreciated. -Cisco