Need more info on what is actually happening. Are you trying to make an ISO are you watching from an ISO, what programs and applications involved etc etc
update your motherboard and graphics card driver. also, have a look at http://forum.slysoft.com/showthread.php?t=15535 . If neither works it's a hardware or driver problem and the only way to solve it is to replace your hardware, maybe the graphics card or the motherboard.