If you now go to the support pages

http://www.larian.com/dragonknightsaga_support.php
http://www.larian.com/fov_support.php

you will find a little tool there that helps us figure out what's wrong. You can also use it to find out yourself if anything obvious is missing (such as wrong PhysX drivers or visual studio runtimes). When sending an email to support@larian.com, please use this tool to generate a report and attach it your mail. It'll allow us to help you faster. We'll be updating the tool as we encounter specific problems so that it'll help you right away.