Long story short... I went to the Dell web site and downloaded an updated driver package from there... just ran Setup and clicked next a few times... rebooted and it worked. The updated driver did appear to resolve some gaming issues I was having.
Something in my gut was telling me I should uninstall the old driver and then use a generic driver then install the new one... the driver installation process did uninstall the old application and driver set first... guess it was easier than I expected.
Thanks for the replies.