Hey, I can't be much of help as I have not (nor will be unless I'm forced to) to use W8..
As you had problems only in fullscreen, and that horrid "windows" is known to have problems with games, programs and drivers, I'm led to believe your problem
is due to incompatibilities and won't be easy to fix without fiddling into it..
May sound silly, but did you google it? did you tried to run them in safe mode or compatibility modes? (asumming w8 has it like w7)
Your best bet for now is to stick to what's proven working, w7 x64. You also may create a partition for w8 or even a virtual machine inside w7.
Just for the kicks

Cheers!