Click Start, click Run, type regedit and click OK
Navigate to the following key: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesDhcp
Right click the key DHCP and click Permissions. Click Add, type network service and click OK
Select NETWORKSERVICE and check the Full control box to grant NETWORKSERVICE full control on the DHCP key.
Click OK to apply the changes and to close the window