Win7 system refuses DVD drive how can this be good?

Some users have reported that the win7 system does not recognize the DVD drive. Is the DVD drive broken? Actually it is not. Some systems cannot recognize the problem that the DVD drive is a win7 system, not the optical drive is broken. Let's take a look.

Phenomenon:

The DVD drive is not recognized by the system. It is just an exclamation point in the device manager. The data signature is problematic:

“Windows cannot verify the device. Data Signature ……(Code52)”

Solution One:

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 UpperFilters, click delete

4. Click & rdquo; Yes & rdquo; Confirm Value Delete

5. Also delete the LowerFilters value. Confirm Delete

6. Exit the Registry Editor and restart

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

Solution 2:

1. Click Start - All Programs - Accessories

2. Right-click on the command prompt - & rdquo; Run as administrator & rdquo;

3. Paste the following command and press Enter:

bcdedit/setloadoptionsDDISABLE_INTEGRITY_CHECKS.

Users should pay attention to it, win7 system can not recognize the DVD drive is not the optical drive is broken, but the system itself, if you have encountered the same problem, don't worry, there is always a way for you of.