I've had windows 7 for the past 3 months and when I was downgrading to windows 8 I had to disable a feature named secureboot which boots all other hardware before windows 8.
So I used the upgrade assistant and got that some devices were uncompatible, but pacha told me the games that it listed as uncompatible was wrong.
I looked at some other stuff and found this in the compatibility list:
Pacha told me he was having hardware problems with windows 8, but I'm not completely sure if I should reupgrade to the OS.
Secure boot is what i disabled in order to install windows 7 correctly
Also, this is a pretty big decision considering I almost forgeted up my computer when I downgraded to windows 7.