Can't get Windows 7 to share internet to LAN from HUAWEI 3G internet adaptor (usb)

Hello, I am in severe need of some help because I am about to go crazy trying to figure this out. I recently upgraded my mom's pc to Windows 7 and I'm having trouble getting her network back in order. She has a HUAWEI mobile broadband adaptor (3g), model EC168, that I'm trying to use to supply Internet to her laptop and Xbox360 via her router. I had it working for the last year when Windows XP was still on her PC, but since installing Windows 7 , I can't get it to work. I'm using the same settings as I was before but I get nothing.
Here are the settings that used to work:

1. I enabled internet connection sharing on her 3G adaptor and shared it to the LAN adaptor.

2.I set the LAN's IP address to ""/subnet mask was the usual "" and the default gateway/DNS server fields were left blank (since the PC was serving as the gateway and the DNS sever).

3. I turned OFF DHCP on the router and set the router's IP to ""

4. I left the Xbox360 and laptop set to "Automatic"

With these settings it worked like a champ on XP, but I get nothing on Windows 7.
Also, everytime I turn ICS "On" through the 3G adaptor, it says that it has assigned the IP address of "" to the LAN. Not sure why but it does.

Well that's it, any help would be greatly appreciated.
Question Info

Last updated March 13, 2018 Views 2,388 Applies to:

Hi calidan777,


Run the Network Troubleshooter for Internet Connectivity on Windows 7 to check for problems that are preventing Internet to share on your LAN.

Click the Start button, click Control Panel, and then, in the search box, type troubleshooter. Click Troubleshooting, click Connect to the Internet, and follow the on-screen wizard instructions.

For more information visit the link below.

§  Using Network troubleshooter in Windows 7


And also follow the troubleshooting steps that are include in the following link below,


Hope this helps!

Yaaser - Microsoft Support Engineer
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