I have ran into this problem on a ACER Laptop and the problem is that I could not get Win 7 Pro VL to activate with KMS. I have been told by others that it can be a real pain to activate Win 7 on a Win 8 PC,I was told on some PC's that the problem is the chip on the Mobo that has the Win 8 Key code installed on it has to be turned off and something else but I forget what the claimed. I know a friend of mine tried this ISO and choose OEM Activation on a Laptop that KMS would not work on and the OEM worked for him,from what I can see it has all the factory keys on it and knows witch one to choose by the make of your PC a lot like the old days when you got a factory Dell or HP disc that had the key code embedded on the disc. [Removed] I fix PC's in my spare time and I know a fair amount but I have never ran into this problem and want to make sure I know what I need to do if someone wants a downgrade to Win 7.