Hello I have an ssd with only 10 gb of space remaining with windows 7 on it, my college is selling windows 8 pro upgrade cheap and I want to get it I am wondering will I be able to install it on this SSD or will space be an issue? Can I just delete windows 7 and replace it by windows 8 during the installation? cause I read u need 20 gbs of free space, but im not sure.