Make sure DX is up to date, as well as all your drivers. Did you install the game from the CD? or did you download it.
Since you are saying all your other games work fine I'm guessing it might just be a corrupt installation. Try reinstalling. I would recommend you download the game from the Official Guild Wars Site
Leave the download to run overnight, and be sure to use the -image command in the target parameters.
Please provide more info about this "Malfunction" as all we could do otherwise is speculate.
Last edited by 0siris; Mar 15, 2008 at 08:36 PM // 20:36..