1. Click on Start, Run, and type REGEDIT and press Enter
2. Double Click on the folder next to the following folders
HKEY_LOCAL_MACHINE
SYSTEM
CurrentControlSet
Control
Class
{4D36E965-E325-11CE-BFC1-08002BE10318}
3. This folder is the DVD/CD-ROM Drive Class Description in the registry. Look for any of the following names in the right hand side.
UpperFilters
LowerFilters
UpperFilters.bak
LowerFilters.bak...