Sorry if this seems like a foolish question but here it goes. Have an older rig that I want to upgrade and pull one of the hd's from my main rig and place in the one to be upgraded. That hd is an unused back up, and has nothing on it. Now in the donor rig I want to put my other hd which has all my files, photos that I want to keep but it is ultimate, and the machine it is going into is pro 64. I will leave the pro as the boot drive as it is all set up and working fine with intended mobo. My main reason for putting that other drive in is to simply access my old files photos, and nothing more. Is this possible, and if so are there any foreseeable conflicts. I was going to simply do a reinstall of windows 7 ultimate without formatting to hopefully save files/photos etc and put it into rig to upgrade, but have run into issues due to different mobo,bios, etc and getting a little frustrating so it seems like less hassle to simply put empty hd into rig to upgrade doing fresh install and leave other alone to simply go into main machine. Sorry if to this seems too long or confusing. Thanks