Just install the driver for it. It will be on the driver disc that came with your mobo or you can download it from the lucid logix website. I found it caused more problems than it solved. I recommend using d3doverrider instead and forcing vysnc/triple buffering. All virtu really is is a complicated way to implement vsync.
I see now that people have totally different feelings about VIRTU Universal MVP so I am not sure if I dare to use it.
What is d3doverrider anyway?