What can I do if I can't find the dvd driver in win7 system?

Although many things can be downloaded directly from the Internet now, but undoubtedly, the optical drive is still a complete computer, in some cases, such as reinstalling the system, etc., all need to use the optical drive, then recently Xiaobian look To a problem, it is quite serious, a friend said that his win7 system win7 system can not find the dvd driver, how to do this? Xiaobian will provide you with two sisters way!
A solution:
This may be caused by the fact that the optical drive cannot be recognized by the system. The solution is simple. Let's open the menu and type the regedit command in the search box. This will open the system's registry editor.


Next we launched in the left column in order HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlClass {4D36E965-E325-11CE-BFC1-08002BE10318}, then click the UpperFilters and LowerFilters options in the interface on the right, right-click on the note, then Just choose to delete it! Finally, you need to restart your computer.

Two solutions:
Click Start - All Programs - Accessories, find the command prompt option, then right click and select Run as administrator.

In the pop-up window, we enter the bcdedit /set loadoptions DDISABLE_INTEGRITY_CHECKS command and press Enter to confirm.