Odd error message

Web Proxy service failed to bind its socket to x.x.x.x (local IP of the
server) port 80. This could be caused by another service that is already
using the same port or by a network interface card that is not functional.
The error code specified in the Data area of the event properties indicates
the cause of the failure.  For more information about this event, see ISA
Server Help.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.

IIS is not running on this system....I find this to be a very odd error..no?

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