I have Vista and one one computer I received an error trying to install the program. The file "PFScroll.ocx" dis not register.
With Vista and Windows7 came the invent of the UAC (User Account Control). If you try to install the program without using a Administrator account, the installation can fail on some versions of Vista or Windows7.
Please see the directions for installing on these two platforms if you should have trouble installing the program.
Make sure you use the correct installation program for your platform or version of windows.
See Disabling the UAC