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What does the message 'NT AuthoritySystem' mean?

When I get on the Internet, I am only on for a few seconds when a message appears that says: "NT AuthoritySystem." Do you know what is making this to occur?
There's an exploit for the Messenger service that will cause this error. Basically, it means you're not behind a firewall, and you have the Messenger service running. You should stop and disable the Messenger service and configure a firewall between your computer and the Internet.
This was last published in October 2003

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