My current computer has a 1tb hard drive. But on this computer i have an OEM copy of windows 7. I just ordered a new motherboard/processor. I want to use this hard drive with new motherboard and processor. I plan on formatting my hard drive before i receive the parts. Once i get the parts i am going to put the hard drive in the new pc and install a retail copy of windows that i recently bought. Will i encounter any problems? Also i am going to put a 500gb hard drive is the OEM pc just to have around in case of problems and such. Will swapping hard drives effect the windows 7 licence? Im not trying to copy my OEM i just want to swap hard drives between new motherboard and processor. And then reinstall windows OEM on the 500gb hard drive on the original computer.