I dont remember the exact name of this service, but if it is something like remote procedure call, just go in administrative tools, services, and find the mentionned service. Open its properties, and you'll find somewhere and option about how it should behave in case of problems. Instead of shut down the computer, select restart service or the other one, that I dont remember. then you'll be able to stay connected to retrieve tools to remove the worm that is active in your computer.
-Always put the blame on you first, then on the hardware !!!