this is my second dell first xps 1540, dell replaced it with a studio 1640 xps,windows 7 with t9600 2.8 ghz processor, 8 gb memory, and ATI Mobility Radeon hd 3670 graphics card my blu ray disc skips every 10 to 20 seconds, hd dvd's play just fine, running Power dvd software 8.3 version from dell pack, the mother board has been replaced twice along with the player, to no sucess, dell now wants to re-format my hard drive just a pain, does anyone know what may be causing this issue I tried to contact cyberlink for help they won't take calls only internet communications and they don't return messages, i had read that there is a version 9 power dvd that might help but can get information or maybe these drives won't work on a computer?