Via bus master drivers???

Whenever I start my pc up I get the box up saying new hardware found. This hardware is the via master bus or something.

I have tried searching for the drivers to install it but they can't be found. Also tried searching on the net but with no luck. Now whenever I start my computer up I get this box, I just press cancel and it doesn't seem to make much difference but it is starting to bug me.

How do I get rid???