Hi CB,
Here is a link for a Registry Cleaner which i use myself so know it's safe....
http://www.wisecleaner.com/download.html
Download and run the free version.
But first, could you go back into Device Manager, right-click on the media controller and choose Properties. Under details it will give you a drop down box and you will find on that list an entry named "hardware ID"..............should look something like this...
FUNC_01&VEN_11D4&DEV_1988&SUBSYS_104381E1
and give me that ID.
This will let me identify and find a driver for the component
have a look at this....
http://support.microsoft.com/kb/310123/en-us