since my upgrade from vista to windows 7 64 bit i can no longer watch blue ray dvds thru my cyberlink software. i've tried updates both thru HP (quickplay) and cyberlink (yes, as adminstrator/backward compatibility). Also, i have lost the ability to use the tv tuner card. i get an error suggesting the antenna is being used by another application. does anyone have a solution to this? has this error occurred to any other user? i have an HP DV5t laptop, which came with vista 64 bit. thx in advance.