I have a Sony Vaio VGN-Z590U that have Windows Vista, i was able to get the recovery CD for Windows 7 but it is for VGN-Z800G when i try to recover i get the error message that this is not compatible with the machine, after i searched i found that i need to modify DMI on the machine , i used DMISCOPE which was able to read the information, and i can edit product name from Z590U to Z800G but after i exit and i comeback it is still shows Z590U, if anybody can show me the correct path to accomplish this, I would be really appreciated. the bios is insyde and the version is R2169M3 and this is the link for the bios. also do i need to do anything about slic, i am new in this concept. s02.download.sony.com/US/pc/ISBSYS-00209810-1030.EXE