Thanks for the reply. Dell actually just updated their Windows 7 driver to the latest Intel reference for the HD4000, so I've got that going for me. Normally I run the Intel reference drivers, but that introduces it's own set of issues. It is what it is.
As to the second part, I know the DirectX version works, as I followed the troubleshooting instructions for Avadon, and downloaded the demo and the DirectX version of the game. It loaded just fine. Unfortunately, Steam does not provide the DirectX version as far as I can tell, so no luck there.
I will give this a try. Thank you!