My topology: On desktop machine: Desktop with USB 3G modem (UMW190 Verizon Wireless) Ethernet on Motherboard USB Wireless (Netgear) Adapter Netgear wireless router w/4port switch Laptops with wireless and wired Ethernet Wireless printer on local network What I want to do: Use desktop to share USB 3G adapter with wireless network and allow file sharing between desktop and laptops over local network and access printer on local network by desktop. What I've tried and what happens: (1) Shared 3G modem on Ethernet Connected Ethernet to WAN port on router Set up router as DHCP: thus I have three networks: WAN from 3G, LAN between Ethernet and router WAN port, LAN from wireless router No wireless adapter on desktop All machines can access Internet Desktop cannot access local network with printer or laptops (no filesharing) (2) Same as (1) but added wireless USB adapter on desktop and enabled. It connects to local wireless network, so desktop can see/access printer and laptops, but all Internet is gone. (3) Same as 1, but connect Ethernet port to LAN port on router and turn off DHCP on router. All LAN devices (laptops and printer) now have address from desktop Ethernet port. All machines get Internet, but desktop cannot access the local network printer or laptops. (4) Same as 3, but enable Wireless USB adapter. Desktop can access the local network and printer, but no Internet for any devices. What I've tried in Windows 7 Networking: Changed the network/binding order. Ethernet top, wireless second; etc. No change. Set the USB 3G modem metric to very low, Ethernet to mid range, and wireless USB to very high. No change. Set the USb 3G modem metric to very low, Ethernet to same as 3G, and USB very high. No change. In all cases, as soon as I enable the wireless USB adapter on the desktop, all Internet goes away. I assume the desktop wants to use wireless over USB 3G or Ethernet over USB 3G. What's the solution? Why doesn't Windows 7 simply identify the only connection with Internet access and route all Internet calls to that port? Your help will be greatly appreciated.

I have a similar problem, did you ever get your issue resolved with a working solution?