No, it happens at all different times....like yesterday, i was getting ready to play RBI Baseball and it froze during the opening national anthem, then i played Salamander for a good hour with no problems after that. Then later on in the evening, i was playing turtles in time, and it froze up on about the 4th level. I can't escape out or anything...when i hit control alt del, it says "this program is not responding, end task?" the programs that are running are windows, dos, and mame. When i alt+tab and go to windows, or the dos screen, then tab back to Mame, it's running again. I don' t have any virus software running, i don't have the internet...not sure what's going on? Seems like mame just locks up?