I have to be honest with ya - the machine is quite messy, software wise. There are tons of things starting with Windows that should not be.
RealPlayer is spyware so I very much recommend to uninstall that. I also would use Task Manager or Regedit to disable or delete all the unnecessary programs starting with Windows.
As for the actual DVD drive problem - if you're already sure you deleted the upper/lower filters as shown or they didn't exist to begin with...
then Microsoft does list
Zune as a problem software in relation to this:
"If the drive is listed, try to play or access a CD or DVD.
If you can play or access a CD or DVD, you are finished with this article.
If you cannot play or access a CD or DVD, you may have to reinstall some programs. Some programs might not be able to use your CD or DVD drive until you reinstall those programs. If the problem occurs again when you install or uninstall those programs, contact the manufacturer of the program to see if an update is available that solves the problem. Some examples of programs that might be affected are:
- iTunes software by Apple
- Nero software by Nero Inc
- Roxio Creator software by Sonic Solutions
- Zune software by Microsoft"
So I would uninstall that then reboot. If the drive still is not shown, check upper/lower filters again and/or reinstall newest version of Zune.
Good luck.