Two ways to solve the problem of Windows 7 does not recognize DVD drive

Some early adopters found a very strange problem after upgrading to Windows 7: the DVD drive was not recognized by the system, and only a yellow exclamation mark in the device manager showed a problem with the data signature.

“Windows cannot verify the data signature of this device. . . The middle is slightly (Code52)”. One way is to turn off digital signatures. This allows the drive of the optical drive to operate normally. On the other hand this is not a perfect solution. To completely solve the problem that the DVD drive is not recognized by Windows 7, refer to the following methods.

Optional Method 1:

1. Type regedit in the Start menu and press Enter. Open the Registry Editor.

2. Expand the following registration key

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

3. In the right panel, right click on UpperFilters and click on Remove.

4. Click ”Yes  Confirm the value to delete.

5. Also delete the LowerFilters value. confirm deletion.

6. Exit the Registry Editor and restart.

Note: When you delete the above two values, you may lose some features, such as CD recorders. 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.

Option 2:

Click Start - All Programs - Accessories, right-click Command Prompt, ”Run as administrator”.

Paste the following command after the command prompt cursor and press Enter: bcdedit /set loadoptions DDISABLE_INTEGRITY_CHECKS

This will solve the problem that the DVD drive is not recognized by Windows 7.