I had oftenly the problem of the computer freezing and the track still playing but impossible to do anything except restarting the computer After 6 mounth i know what hapened its cause to the vibrations when youre playing means that if the computer is to next from the monitors or if you feel vibrations under the computer you take a risk of freezing he only advice i can give is to put something between your computer and where you put it...
Hope it will help some people...
Peace