Thanks for your interest in our products. At present our Powersuite products (SpyEraser, Registry Booster and SpeedUpMyPC) are fully compatible with :
Windows 2000 Professional
Windows XP
Windows Vista 32bit
64 bit compatibility is something that we are at present looking to update very soon. I can confirm we do have a large majority of users who presently use our PowerSuite products on 64 bit versions of Windows without a problem, although, at present we cannot officially say that we support the 64bit operating system.
For updates on 64bit compatibility I suggest joining our newsletter:
http://nct.digitalriver.com/fulfill/0138.007