Continous system shutdown

[Mark]

It's the new virus that has been going around. Microsoft
has a patch for it or you can check the symantec website.
>-----Original Message-----
>I am having a problem with my computer continually
>shutting down while on the internet. This is the message
I
>receive:
>
>This system is shutting down. Please save all work in
>progress and log off. Any unsaved changes will be lost.
>This shutdown was initiated by NT Authority\system.
>Windows must now restart because the RPC service
>terminated unexpectedly.
>
>I have Norton Antivirus and nothing shows to infected.
How
>can I fix this problem?
>.
>