os (windows 7 extreme r1 64-bit) no it is not the first time it did that the first time it happend when i played music +- 5 hours then and the sound didn't come back but i swithed off the machine for an hour and switched it back on and every thing was back to normal windows programs eg: printer,eset,nero is on a 250gb hdd only and games and other files are on a 1000gb hdd Top :