I have the following situation in Win 8: Internet-Connection is provided by a USB stick. But while having this connection, I would also like to use a WIFI connection (to an apple airport express in order so access local gadgets at home.) i can manage to run both connections, but obviously I don't manage the routing well. As soon as I switch on the Apple Wifi connection, i loose internet access although the Wireless Broadband from the stick is still active. I am not proficient enough in windows routing to solve this myself and while searching for a long while found no hints online that would enable me to solve this. Thank you so much for any suggestions. Matthias
The reason you lose internet is because when you connect to two networks you would have two routes, one via the usb stick and one via the wifi adapter. There are a couple of options.
Change the adapter priority:
Use a static IP address on your wifi:
Your computer will now be able to communicate to the internet via your usb stick, and your lan via the wifi.