Windows 7 failure: DVD drive is not recognized by the system

        I do not know after the upgrade to Windows7 have not encountered a very strange question: is the DVD drive is not recognized by the system, just a ... exclamation point appears in the Device Manager in the data signature in question:

" Windows can not verify the signature data for this device ... middle slightly (Code52) "

One way is to close the digital signature. This allows the drive of the optical drive to operate normally.

On the other hand this is not a perfect solution. The webpage teaching network reminds everyone to completely solve the problem that the DVD drive is not recognized by Windows7, refer to the following methods.

alternative method a:

1. Start menu type regedit, carriage return. Open Registry Editor

2. Expand the following registry key

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

3. In the right panel, right UpperFilters, click the delete

4. click "Yes" to confirm value delete

5. LowerFilters also deletes this value. Confirm Delete

6. Quit Registry Editor, and then restart

Note: When you delete two numbers above price it is likely to lose some features, such as CD recording program. If this happens, you must reinstall the affected program. If the problem persists, you may need to contact the program vendor to see if there is an updated version of this program.

Optional Method Two:

1. Click Start - & gt; All Programs - & gt; attachment

2. Right-click the command prompt - & gt; "as administrator run "

3. paste the following command and press Enter:

bcdedit /setloadoptionsDDISABLE_INTEGRITY_CHECKS