I'm building a new computer and I am getting all new parts except the HHD PSU and optical drive. I want to save money by just removing the HHD from my previous computer and putting it in this one, but how do I go about doing it WITHOUT wiping windows 7 off it? I don't want to just plug it into my new computer because it will still have all the old drivers/software and all that stuff. Is there a way to do a clean reinstall or restore on my current computer? That way I just have windows set up on it already, but without all the software from my old computer, then I can just plug it into my new set up and have it working?