HP laptop dv6140 (RG274UA#ABA), system board ID 30B7 with BIOS version F.3D.. Installed Windows 7 upgrade. I feel certain I did this with DVD which meant that the DVD was working. However, I no longer see the DVD in either the BIOS or in Windows 7 except that I can alter the boot sequence to CD/DVD but that didn't help. Can anyone explain this and suggest what may have happened to my DVD drive and function? I know it is working since I can hear it spinning up when I put a CD or DVD in it. Also, I think there is a recovery partition on the hard drive but have been able to find a way to get to it. I would be fine with XP right now if I could get to the recovery partition. I think this system is originally XP Media.