The Internet Gateway icon represents the Internet connection on your
network -- it's either a broadband router or an Internet Connection
Sharing host computer. Clicking the Internet Gateway icon lets you
monitor and control the Internet connection.
I don't think that the Internet Gateway icon itself can cause
connection problems, but here's how to remove it:
1. If you have an Internet Connection Sharing host, un-check the box
in the shared network connection's Properties | Advanced that says
"Allow other network users to control or disable the shared Internet
connection".
2. If you have a broadband router, connect to its web server interface
and disable the Internet Gateway. It might also be called "UPnP" or
"Universal Plug and Play". See the router documentation for details.
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Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)