Craftynon

Hi, I am trying to install a craft program from a disk, but all I keep getting is - failed to expand shell folder constant "Userdocs" please tell me how to sort this out! I am using Windows 7 Home Premium, service pack 1, AMDC-50 processor 1,00GHs, 4,00 GBram 64 bit Operating system. PS This computers user name is for the person I bought it off of. I really hope you can help and thank you.