That's a common error seen with ATI as well as NVidia drivers when the main graphics driver fails to load properly. If the problem persists simply remove the current set and try another fresh download.
You can also go back to the previous version in case the latest is a beta or is seeing a fault of some type. The latest may be too new for the model card you have there if you are running an older model. That would be another thing to look at.
