Can't find DVD drive reason on Windows 7

        There are more and more users using Windows 7 system, of course, everyone will encounter various problems in the process of using win7. A common problem with Win7 is that the system prompts that the DVD drive cannot be found. The DVD drive is not recognized by the system. In the device manager, there is only an exclamation mark indicating that the data signature has a problem: "Windows cannot verify the data signature of this device... (Code52)"

To completely solve the Win7 system prompts the DVD driver can not find the problem that the DVD drive is not recognized by Windows 7, refer to the deep Windows 7 Ultimate Ghost xp sp3 to download the following methods.

Resolve Win7 system prompt DVD driver can not find an alternative method:

1. In the start menu, type regedit, 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 "Yes" to confirm the value deletion

5. Also delete the LowerFilters value. Confirm Delete

6. Exit the Registry Editor and restart

Computer Company System Download Tip: When you delete the above two values, you may lose some functions, such as CD records. 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.

Solving the Win7 system prompts the DVD driver cannot find the optional method 2:

1. Click Start->All Programs->Accessories

2. Right-click on the command prompt -> "Run as administrator"

3. Paste the following command and press Enter:

bcdedit /set loadoptions DDISABLE_INTEGRITY_CHECKS