Dear Sony® VAIO® customer,
The W32.Blaster worm virus has affected many computers around the world. Symptoms of the virus include, but are not limited to, the computer suddenly restarting or an error stating "NT Authority is shutting down your PC" appearing. This virus infects your system through an open port when connected to the Internet and then tries to transmit itself to other systems via the Internet.
For further details about the virus, please visit http://support.microsoft.com/default.aspx?scid=kb;en-us;823980 or http://www.cert.org/advisories/CA-2003-20.html.