This is the best answer, provided you have a connection on your computer that looks like a phone jack. If so, get yourself an ethernet cable (it will look like a thick telephone cable) with little plastic clips on both ends. Clip one end into the phone jack on your computer and click the other end into one of the output jacks on your router.
They make 15-foot ethernet cables although you'd be better off to configure the connection at eight feet or less if it can be done. You can find ethernet cables at any electronics, computer, hardware or Wal-Mart store. If there are choices, look for one that says "CAT5" for simple computing.
Your router will probably have blinking lights for the connection you just made that will indicate data is moving between the router and the computer. Once that is established, unplug the USB wi-fi part because you won't need it. A reboot of both computer and router may be needed.
The benefit to this solution is you now have a direct wire between your computer and your router that is not subject to any interference from passing signals or too-close neighbors. It should not shut off like your wireless is doing.
