Yes, it is a legal and oficially purchased version of Vista Home Premium sp1 32Bit. Without sp2 slipstreaming there is no problem by installation. After installation of Vista Homepremium sp1 32Bit, Sp2 can be installed without any problem It is only after sp2 slipstreaming, I face the product key problem. One needs sp2 , because without sp2 Vista Homepremium makes problem with some usb hard disks, not all but some, e.g. with USB AluDisc 500GB of OneTechnology; by plugging this hard disc to Vista Homepremium sp1 32Bit system, the system crashes with blue screen, with sp2 installed, it does not. Any suggestions!