What if the optical drive is not recognized by Win7?

Reason Analysis:

The problem may be caused by an incorrect key value in the registry.

Ultimate Solution:

Tip: There is a risk of modifying the registry, please proceed with caution.

1. Press Win+r key, enter Regedt32.exe, press ENTER, open Registry Editor;

2. Locate the following key values:

HKEY_LOCAL_MACHINE--SYSTEM--CURRENTCONTROLSET--CONTROL--CLASS--{4D36E965-E325-11CE-BFC1-08002BE10318}

3. Locate and delete UpperFilters and lowerfilters in the right box (find UpperFilters and lowerfilters in box)

4. Restart the computer to see if the optical drive is recognized by the Windows 7 system.