Plug and Play Software Device Enumerator Error code 31

I notice that when I shut down the computer. There is no music or sounds emanating from my speakers! No music when I start up the computer!
I Immediately went into the Device manager and noticed under System Devices | Plug and Play Software Device Enumerator is an exclamation point at the front of its line. When I click on the properties for the Plug and Play Software Device Enumerator, I see the following message: “This device is not working properly because Windows cannot load the drivers required for this device. (Code 31)”

I have disable, enabled, deleted and reinstalled the Plug and Play Software Device Enumerator. The exclamation point remains.
http://www.annoyances.org/exec/forum/winxp/1066496675?s

I have uninstalled and reinstalled the drivers for the onboard sound card as well. It appears that I cannot get rid of whatever is in the way of the Plug and Play Software Device Enumerator so that the appropriate drivers are properly load it up for this service.

How can I get rid of that blasted exclamation point?