PFS Window Works appears to be very old software so it is not surprising it will not work with Windows 7. If you are using a 64 bit OS there is no way it will work. You should obtain software that is compatible with a modern OS.
The information on Computing.Net is the opinions of its users. Such
opinions may not be accurate and they are to be used at your own risk.
Computing.Net cannot verify the validity of the statements made on this
site. Computing.Net and Compnet Ventures, LLC hereby disclaim all responsibility
and liability for the content of Computing.Net and its accuracy.