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KEWoodsideFlag for United States of America

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Netgear WNDA3100 v2 conflict

I have a Netgear WNDA3100 v2 wireless USB adapter. When connected to a PC that is standing alone, it works fine. Once I connect that PC to my local network, I lose ability to communicate. I've tried this on multiple PCs & notebooks, on multiple Windows OS.
Any ideas?
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When you say that it works fine on a stand alone PC, does it pick up a random wireless network that isn't your local network?
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Thanks for the response, Rob-
Here's the scenario - I'll try to be brief:
I have a small peer to peer network.
My cable modem is out & I have purchased a 4G hotspot (Verizon Jet Pack) and a handful of the Netgear wireless USB devices.
The Netgear device will initially establish a stable WiFi connection with the hot spot and we get a good internet connection.
The problem starts when I reconnect the PCs to the local network: either the internet traffic stops or the LAN traffic is disrupted. As though I have an IP address conflict.

As a test, I ran the same scenario with my notebook, first using the internal WiFi card. This worked perfectly, as expected. Strong WiFi internet connection and no disruption to LAN connections.
I then disabled the internal WiFi card and connected the Netgear device - this gave me the same problems I was experiencing with the PCs.
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In hindsight, 'twas a dumb question to begin with...