you may not need software to do it just you r web browser.
eg.
Address bar : 192.168.1.1 (or the IP address of the router)
If you don't know the address if router at a guess this is normally the same as your default gateway address. This can be found by (assuming windows) start > run > (type) 'cmd' > press enter then at the flashing cursor type 'ipconfig' (with out the ') look for gateway address in the list and then put that number in the address bar of your browser. With a bit of luck you will see a login page.
regards