[CheatMaster]

Yes I had this problem too with the drivers that have the new style of control panel.I just update my drivers and one day I run PCSX2 and notice that the speed is half than the speed I have before(I try KH1).So I start to search what cost this and the only thing that I do from before when the emu runs at normal speed(for me) was that I update my drivers from 81.95 to 94.24.So I downgrate my driver and everything was back to normal

KH1 movies:
with 81.95 was 45-60
with 94.24 was 20-25

I didn't try full screen but the problem was the newest drivers