You would have to access the routers configuration utility. How you access it depends on the router, for many you open your web browser and type 192.168.0.1 (or whatever IP address is your routers, to find open a windows command line (CMD) then type "ipconfig" and it is the ip listed as default gateway in the info on your wifi adapter) then enter the username and password (they are usually the default from the factory and documented in your routers manual. What do you have for a router?