can not turn on windows auto update
I using Dell Studio XPS 1640 and Windows 7 7600 RTM, already dupated 8 hot fix. Today I have a problem with the Auto Update of windows, it can not be turned on even when i tried to switch it on in Action Center or in Windows Update in Control Panel.
There is always a message like this: "Action Center can't change your window update setting"'. When I choose "Change setting manually", there is nothing happens.
Please help me with this case. Thanks.