I bought a copy of Win95 upgrade on 3.5" floppy at a going- out-of-business auction. When I try to install it, it says it has already been installed, etc., and lists the previous owner's info. How can I delete that info, so it will come up blank upon installation, and allow me to enter my info? I can't find the file modified by windows that includes the specific user information. In effect, I want to "unregister" this copy of windows.