I want to install a larger HD,I have an 80gig hd right now and I would like to upgrade to say a 200gig, my question is if I buy a new hard drive can I just replace my old one with the new one and then install my system restore disk that came with my computer? Will that format the drive and install windows and everything or do I need to do something to the HD first? I will of coarse backup all my data first so after install I can just put it back!