How do I play the Crysis demo??

When I try to start it says ''This application has failed to start because d3x1-_34.dll was not found''How do I play the Crysis demo??
Sounds like your missing a file. Either the download was corrupt or missing some parts, uninstall the demo, try downloading the demo again, then reinstall. If you get the same message check some Crysis support forums. That's what I would do. How do I play the Crysis demo??
Update Drivers For Graphics card..? Reinstall Game?
1) PC specs? 2) Update the DirectX and get the latest drivers for your graphics card.