vista dhcp client service hung on starting

Hello , I have a Problem with the Vista Dhcp Service , I seek your help because I can not connect to internet with my wifi freebox under vista.
Although the service is Dhcp Should have Been Started automatically, but it is not started. If I try to start it manually, It Give Some error the following error , please help and Solve my problem

To resolve this problem, use one of the following methods:

1. Reinstall or repair the missing.
2. Install the dependence of DHCP client service in the registry. To do this, follow these steps: Click Start, click Run, type regedit in the Open box and then click OK.
   
3. In Registry Editor, locate and click the registry subkey follows:
   HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ Dhcp
   
4. Right-click on the entry DependOnService, and then click Edit.
5. In the value data, delete the service that is described in the events that appears in the "Symptoms" section.
   
   
   Note In general, the only entry DependOnService are the following services:
   • TCPIP
   • Ferm
   • NetBt
6. Close the Registry Editor and restart the computer.

To work around this problem, add the ProtectedStorage dependency to the DHCP Client service. To do this, follow these steps:

1. Click Start, click Run, type regedt32, and then click OK.
2. Locate and then click the following registry subkey:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Dhcp
3. In the details pane, double-click DependOnService.
4. In the Value data box, position the pointer underneath any existing values, type ProtectedStorage, and then click OK.
5. Exit Registry Editor.
6. Restart the DHCP Client service.

This problem occurs because of a dependency between the DHCP Client service and the Protected Storage service. Security update 914388 introduces this dependency. Therefore, this problem occurs after you install security update 914388.


During the DHCP Client service's startup process, the Protected Storage service may not start. When this happens, the DHCP Client service changes its status to "Starting." The Service Control Manager (SCM) cannot start other services until the DHCP Client service changes its status to "Started" or to "Failed." The DHCP Client service takes several minutes to change its status. Therefore, the "Preparing network connections" stage of startup takes longer than two minutes.