How to deal with the yellow sigh on the Win7 system device manager CD-ROM drive?

Everyone knows that the Win7 system's device manager can display the hardware drivers. Some users find that there is a yellow exclamation point on the Win7 device manager. This means that the driver is not installed correctly and the corresponding hardware cannot be used. How to deal with the problem?

Specific methods are as follows:

exclamation point method processing device manager drive:

1, using Win + R Win7 operating system to open, open type regedit Win7 system registry editor;

2, the positioning to HKEY_LOCAL_MACHINE \\ sYSTEM \\ CurrentControlSet \\ Control \\ Class \\ {4D36E965-E325-11CE-BFC1-08002BE10318} UpperFilters and LowerFilters in two;

3, both right and select delete and then quit registry editor.

The above is the solution for the optical drive driver in Win7 Device Manager with a yellow exclamation point. For the sake of insurance, you must back up the registry before deleting these two items. If something goes wrong, you can restore it directly.