I recently purchased this, installed it on my old computer using the install cd and it worked for 6 months great. now, i have a new computer and i put it in, and it can read regular cd's but not dvd's. i think it is because i haven't properly installed it, but my mother threw out the install cd and i cannot find the drivers anywhere. I also get the message when i try to play dvd's that i need to update my video adapter driver. any advice? i am running a dell dimension 4300 w/windows xp & pentium 4 processor and 512MB ram.