My first suggestion would be to check nVidia's site, and ensure that you have the latest WHQL-certified driver kit installed. Once you have done that, if the crashing persists, the only way we can help you here is if you give us as much info about your system as you can; then the techie types here (including me) can better aid you in troubleshooting the issue... or come up with a bug report for E-on.