What should I do if the device manager driver in win7 displays a yellow exclamation mark?

            We know that the drivers in the win7 Ultimate system download are very important. They are the hardware of the computer and are part of the computer. If something goes wrong, it will directly cause some functions in the computer to not work properly. For example, if we are familiar with the sound card driver, if the sound card driver fails, the computer will not be able to sound, so things like video files will not work properly; there is a network card driver, if the network card driver fails, then our computer It is impossible to connect to the network. Of course, in addition to the drivers such as graphics cards, it is also very important. So today, Xiaobian will introduce, if there is a yellow exclamation mark in the win7 Ultimate device manager CD drive, how do we deal with it?
1. First, let's press the win+R shortcut on the win7 Ultimate keyboard at the same time. Open the computer's running window, then type regedit in the window and click Enter. This will open the registry editor window of your computer.
2. In the open registry editor window, we click to expand HKEY_LOCAL_MACHINE \\ SYSTEM \\ CurrentControlSet \\ Control \\ Class \\ {4D36E965-E325-11CE-BFC1-08002BE10318} in the left menu, then right Find the UpperFilters option and the LowerFilters option in the side window. Right click on the two items, delete them, and then launch the registry window.