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Running 2 network cards on same computer, but only one network at the same time

Hello experts,
I'd this issue:
I am running on 3 pcs, one PC has the main application and this must not be connected to the Internet, is there some way that when I enable the wireless network card on my computer (wireless is used for the Internet), it disables the local area network which is plugged (cabled), and vice versa.
There is a 2 pcs running xp pro sp2, and one is running ME.
Thanks for your support
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2 Solutions
What network cards do you have exactly and what system is it?

On many laptops this can be enabled in the BIOS to happen automaticly.
houssam_balloutAuthor Commented:
DLink for wireless and for wired.
is there some script or program that  enables just one network at a time.
Aparantly there is a tool in Windows devcon that does this:


You can construct a batch file as explained in that solution to do what you need.
What kind of computer do you have?
There is often an option right in the wireless card's driver to disable it when an ethernet connection is detected. e.g. see attached. The option I'm talking about is ''Disable Upon Wired Connect'' - 5 lines above the option selected in that picture.
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