Type this in cmd: ipconfig/all it will display the current ip's connected to the router or your network by chance.
Depending on what router you have this my belkins default ip address:
192.168.2.1 by factory default, if you have not set a password for the router don't, usually it's best that way.
For the username most default router logins are admin
If you gain access to the router, look for a tab to your left or right that says wireless management or access points.
For adding on such devices as printers, blu-ray or phones or high tech camera's go to the tab thats ,ac filtering, look on the device for a mac address such as this:
Make sure the device is online or scanning for your router and put in the address and hit submit.
If everything goes correctly it will show up on your network shortly.
For 128bit wep key encryption security which I recommend for home networking follow this:
I wish I could be there personally to explain and help set it up for you, as typing down way too much of this racking my nerves abit.
But that should help out some and carnage or anyone else can follow through with you if I don't show up later on in the day.
By the way I screwed up the resizing in imageshack my apology for that.