What if the Win7 optical drive doesn't work?

I do not know if you have been upgraded to Windows7 has encountered a very strange problem: that is, DVD optical drive is not recognized by the system, in the Device Manager is just a ... the exclamation point indicates a problem with the data signature:

"Windows cannot verify the data signature for this device ... Middle slightly (Code52) "

One way to do this is to turn off digital signatures. This will drive the drive to work correctly.

On the other hand, it's not a perfect solution. To completely resolve the issue of DVD optical drive not being Windows7 recognized, refer to the following methods.

Optional method One:

1. In the Start menu, enter regedit, carriage return. Open Registry Editor

2. Expand the following registry key

HKEY_LOCAL_MACHINESYSTEMCURRENTCONTROLSETCONTROLCLASS{4D36E965-E325-11CE-BFC1-08002BE10318}

3. On the right side of the panel, right click on upperfilters, click Delete

4. Click "Yes" to confirm the value deletion

5. Also delete the LowerFilters value. Confirm Delete

6. Quit Registry Editor and reboot

Note: When you delete the top two values, you may lose some functionality, such as a CD recorder. If this happens, the affected program must be reinstalled. If the problem persists, you may need to contact the program vendor for an updated version of the program.

Optional method Two:

1. Click Start-All Programs-Accessories

2. Right-click the command prompt-"Run as Administrator"

3. Paste the following command and enter:

Bcdedit/setloadoptionsddisable_integrity_checks.

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