I'm having a desk top rebuilt (keeping video,case,power). I was told to install win 8 but would like win 7. We have two other laptop that will be win 7 and wife would not like leaning new OS. Is there a way for win 8 to look like win 7,with out degrading win 8 and then in future get my wife to move to new OS . Also if I do get win 7 installed can I upgrade to win 8 in a few years or would there be extra charge to upgrade.