over the last few weeks i've been notcing a rather annoying issue where just as my dvd drive starts to read the cd, my comp will freeze. i haven't tried it in my normal cdrw drive because i rarely use it any more. but when i play dvds or lately mostly when i start halflife 2, it locks up. same thing when i open my computer and it spins up to see what the cd is in the drive. it doesn't do it every time, so when i have something open and i just open my computer to do something, it's really rather annoying. any ideas?