Microsoft Kernel GS Wavetable Synthesizer

I have been having an issue with this particular piece. I installed some
software that required Midi, but it wouldn't play because it said I didn't
have any Midi output

So I checked my device manager, and in the Sound tree, I have an unknown
device. So I try to update the unknown device, and it says it is going to
update 'MEDIA'. So I try the update, and it says 'There was a problem
installing this software:
"Microsoft Kernel GS Wavetable Synthesizer"
An error occurred during the installation of the device
The data is invalid

So I have searched around everywhere, posted in tech support forums here and
there, but have never gotten a response, only another guy who had the same
problem.

I am by no means an idiot when it comes to computers and such, but I have no
idea how to fix it.

I am running a Core2Duo 4400, 2gigs of RAM, x1950Pro, on an Asus P5B-VM SE
motherboard

OS is XP Home with full updates (As far as I know)