Keyboard/Mouse compound device won't install

I have a great keyboard that I love. It has an integrated pointy stick and
the old 'IBM' feel. It is a USB keyboard with a single USB connector.

The problem is when I plug it in, it doesn't find drivers. Should just be a
generic HID device. It works flawlessly with Windows XP (surprise,
surprise). The vendor says it is Microsoft's problem as it is just a
keyboard (I see their point).

Anyone seen this problem before?

Tom