Thanks for your interest in our products. At present our Powersuite 2009 products (DriverScanner, Registry Booster and SpeedUpMyPC) are fully compatible with :
Windows XP 32bit
Windows Vista 32bit
64 bit compatibility is something that we are at present looking to update very soon although, at present we do not support the 64bit operating systems.
For updates on 64bit compatibility I suggest joining our newsletter:
http://nct.digitalriver.com/fulfill/0138.007