I've tried the automatic and manual fixes on Microsoft.com for the upper and lowerfilters. I've checked the BIOS, and under ATAPI, IDE, and CDROM there is nothing, all blank. I don't have nero or Roxio as some ppl ask, I have NTI.
My computer is an Acer Aspire 5100, Vista, the DVD rom is a CD rom also. The odd thing is I've had this problem for a while (over a month), and every once in a while the DVD rom shows up, I try and burn a CD and it fails and disappears again.