My combo DVD-CD writer did the same thing. I'd also lost some options in the AutoPlay tabs (which is different from autorun). I was missing Blank CD and Video movie in the drop down selections to choose what to do when those types of disks were inserted. (Take a look at yours and see if any are missing.)
I searched for days trying to fix my problem. I did all the other reg changes, did the upper and lower filters routine, used all the utilities I could find on the net and nothing worked. I tried TweakUI, AutoPlayRepair, Auto Fix, Clean Handlers. I always used System Restore before each one. When they didn't work, I uninstalled them and used my restore point to start over again.
I finally found a forum post in Google that pointed me here.
http://support.microsoft.com/default.aspx?scid=kb;en-us;330135
It talks about Roxio, which I don't use, but I read on. My fix was using #3 and #4. I'm betting it was #4 that really fixed me because I'd already made the changes earlier that are described in #3. Once I applied the changes to Winlogon, I got my missing Blank CD and Video movie back in my drop down selections and my drives now appear and work as they should.
Who'da thunk it was Winlogon causing all the problems.
My drive has been working perfectly since.
