I'm continually building a new PC. If I put my hard drive from my old PC into my new build will that negate the need of purchasing a new Windows operating sytem? Will all the stuff that I've occumulated the past 2 years pop up on my new build without having to redownload everything? The motherboard I'm looking at is a Gigabyte GA-X79-UP4 LGA 2011 X79 ATX. Still new to this DIY stuff. Oh and my old hard drive is a 1TB SATA III.