Win7 does not recognize the ultimate solution for optical drive

Unrecognized optical drive (CD-ROM) in Windows 7 system, or display drive damage or a yellow exclamation mark in "Device Manager"? We can try to uninstall/install the driver again, but what if it doesn't work? Cause Analysis: The problem may be caused by an incorrect key in the registry. The ultimate solution: Tip: Modify the registry is risky, please be careful. 1. Press Win + R keys, enter Regedt32.exe, press Enter, open the registry editor;

2. Locate the following key: HKEY_LOCAL_MACHINE - SYSTEM - CurrentControlSet - Control- -Class - {4D36E965-E325-11CE-BFC1-08002BE10318}

3. find and remove the right box and the LowerFilters UpperFilters (shown below box Looking UpperFilters and the LowerFilters)

4. restart the computer to see if Windows 7 system can recognize the drive.