Hi bigmamma, hope your good :), It's been crazy at work lately so I've been staying away from computers when I get home, thought I'd come and have a look tonight though :)
Right, musicmummy,
On the main computer click start, then run and type in the letters cmd and hit enter, in the black window that comes up type in ipconfig and hit enter, make a note of the number after "default gateway" (it will be something like 192.168.2.1
Now open a web browser and type that number (including the full stops) into the address bar and hit enter
When you're prompted for a user name and password enter the user name admin leave the password blank and login.....
let me know if it's working so far and you are seeing the admin pages for your router