DVD Drive won't read anything.

Hi, I recently upgraded to Windows Vista Home Premium x64, and now my DVD
Drive won't read any discs at all.

I ran into this once and managed to upgrade my firmware and it worked for
about a week or so, then it started to not even pick up any cd's or dvd's i
put in. When I try to access it depending on which it feels like, explorer
will lock up and i'll have to restart to get it back to a "normal" state, or
i'll get "Please insert a disk into drive D:" message.

I've tried several disks, including a copy of crysis, my motherboard utility
cd, burned dvd's and 3 different music cds.