ive just gone to burn an audio cd using nero and put disk in and it said disk not writable, so i try another and it says the same........these disks are new i bought them today, so i try a disk from the 2nd pack i bought and get the same message so i try them again using my other writer and get the same???? so some how both my lg cdr writer and my philips dvd/cd writer have decided to play up at same time. ive tried putting in a dvd movie (non copy) and it doesnt play or acknowledge it? so come computer whizzes what gone wrong? i had the machine open on sunday to put in more ram but ive checked to make sure cables are still plugged an all appear to be ok?