So I have a Gateway dx4831-01e computer which is running Windows 7 on a 1tb HDD (not sure what brand). It also has an EVGA Geforce GTX 650 2gb GDDR5. So I have two older HDDs (One 500gb and the other 160gb) and I was wondering if/how I can install them. Both of the older HDD's have Windows Vista installed and one may or may not (going to check it out soon just assume that it doesn't) have a virus. I have all supplies necassary I believe. (Sata cables and screws) So if someone could just explain to me how I could do it that'd be great.