"TSST corp" means Samsung. (That's what my Samsung drive shows up as). Try upgrading the firmware per the instructions on this page
. (Note: In the words of of commenter, this site does have popups, but the content is useful. Solution: use Firefox, which has a built-in popup-blocker.) This webpage from HP
also provides good steps for troubleshooting CD/DVD drive problems in Vista (should work with 7 as well, since they share the same driver platform and have a similar UI).