in command prompt type in:
ipconfig
Your router address is the number on default gateway, like (xxx.xxx.xxx.xxx).
Put that number in your web browser.
When it ask you for user name and password, enter your router's user name and password.
If you do not have one, it is likely you are using the default user name and password.
Google for the default user name and password for you model of router and enter default user name and password to enter router settings.