Background: The customer has a four-station file sharing network using Win7 PCs. He is in a very rural area, with no DSL or cable access. For years he has been using a terribly slow satellite connection for internet, plugged into a router along with all his PCs. With the exception of the extremely slow internet, this setup has worked fine in terms of file sharing across the network, and internet access.
Now he wants to get his internet access from a faster Verizon hotspot. I am testing with my Verizon JetPack, which is a standalone wireless device that will support up to five PCs at once. I have also added a USB wireless adapter to each PC, for the sole purpose of giving each PC internet connectivity from the Verizon JetPack. Meanwhile, the Cat5E network cables are still connected from each PC to the router, so that they can share files.
The problem is that things won't work right if both are connected. In other words:
If I disconnect the USB wireless adapter and leave the Cat5E network cable plugged in to each PC, I can share files across the network, but of course I cannot get internet access.
If I disconnect the Cat5E cable and reconnect the USB wireless adapter, I can get internet access, but of course I cannot share files across the network.
If I connect both cable and wireless to a PC, then I can no longer get to the internet. It's as if each PC thinks it's supposed to be getting it's internet connectivity via the LAN, like it used to do--or something like that.
I'm hoping someone has an idea of what is going wrong here, and how to fix it. TIA