I'm going to second the PC Manufacturer problem, or possibly OS related.

Was there a specific reason why you think it's keyclone? Besides having keyclone running at the time of the crash? What else was running?

Which isn't to say that it couldn't be a keyclone related problem, just that with the number of users here who have used keyclone with no problems, and the way keyclone interacts with your system (to my understanding) the chanes of it causing your OS / hardware to become inoperable seems unlikely.

-Stav