Win7 32-bit system can not recognize the DVD drive is the optical drive broken?

Depth technology win732 bit system used in the DVD drive when the encounter is not recognized, how is this? Is the optical drive broken? Or win7 What's wrong with the system? Many users should have this question when they encounter this problem? Don't worry, let's take a look at Xiaobian to teach you to identify this fault.

Symptom:

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 data signature for this device ……(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.

Through the above tutorial we can understand that the DVD drive is not broken. In fact, there are certain loopholes in the win7 system itself. If it is unrecognizable, you can follow the tutorial in the system to set up the relevant settings. Then you can easily identify the CD-ROM.