Unexpected shutdown while using Netzero

[Jon]

Error message pops up that refers to NT AUTHORITY/SYSTEM
saying the Remote Procedure Call (RPC) must shut down the
computer. A timer starts with 60 secs until shutdown.
Only occurs while on internet using Netzero. "NT
AUTHORITY error is odd becuase this is happening with XP
OS. Occurs randomly and not every time. Thanks.

 

[Ron Lowe]

Error message pops up that refers to NT AUTHORITY/SYSTEM
saying the Remote Procedure Call (RPC) must shut down the
computer. A timer starts with 60 secs until shutdown.
Only occurs while on internet using Netzero. "NT
AUTHORITY error is odd becuase this is happening with XP
OS. Occurs randomly and not every time. Thanks.

Sounds like you've been infected with the Blaster worm.
Follow the steps in this article carefully:

http://www.microsoft.com/security/incident/blast.asp