What if the DVD drive is not recognized by the Win7 computer?

Do you have a lot of friends who are still using DVD optical drive? The previous XP system made the DVD fluent and not a big problem to use, but after upgrading to ghost Win7, Many friends have found the following strange problem: Windows cannot verify the data signature of this device ... Middle slightly (Code52). Win7 system does not recognize DVD optical drive, a large exclamation point so many friends at a loss, in the end what is a digital signature problem? How to solve it? The following, small series will solve the way to specifically introduce:

1. Open the computer's registry Editor, the method is very simple, directly press win+r, and then enter regedit and click Return.

2. After opening the Registry Editor, let's start hkey_local_machinesystemcurrentcontrolsetcontrolclass{in the menu on the left. 4D36E965-E325-11CE-BFC1-08002BE10318}

3. Find the UpperFilters in the right window and click the right button to select Delete.

4. If the system pops up to confirm the deletion of the value of the window, we can click on the right.

5. As described above, delete the LowerFilters option in the right window.

6. After completing the above operation, we need to reboot the computer for the settings to take effect.