WIN7 System Device Manager CD drive with yellow exclamation how to do?

WIN7 System Device Manager CD drive with yellow exclamation how to do?

The specific methods are as follows:

The Device Manager has an exclamation point processing method on the optical drive:

1, the use of win+r to open the Win7 system operation, input regedit open the Win7 system Registry Editor;

2. Locate to HKEY_LOCAL_MACHINE \ SYSTEM \ currentcontrolset \ control \ Class \ {4d36e965-e325-11ce-bfc1-08002be10318} UpperFilters and LowerFilters in the two items;

3, right click on these two items, select Delete and Exit Registry Editor.