Hi there! I seem to be having a problem here. Everytime I attempt to install the demo, I get an error that says: "Installation cannot continue because this game requires DirectX 9.0c or higher to be installed on your system." I have Windows XP SP2 (with DirectX 9.0c installed), and a Ge-Force 6600GT PCI-E with the latest WHQL drivers installed (84.21). Previously I had installed the 84.43 drivers and uninstalled them thinking that was the problem. I have no issues installing or playing other DirectX 9.0c games, such as F.E.A.R. I have re-downloaded the demo twice from 2 different locations, but I am still getting the same error I noticed someone else on here had the exact same problem, but no one replied to his post, so hopefully someone can us! Thank you!