No offence, but you are just a guy (or a computer?), but there are some handsome dudes around, if you know what I mean...
I would change our router name (at the moment it's called something like 'TalkTalkac564') but I can't work out how to change it...
Enter the IP address of your router into a web browser. It's usually 192.168.0.1 It will ask for a login name and password. You'll need to check your ISP documentation if you don't know what it is. Then look for the SSID and change it to whatever you want. Your wirelessly connected devices will lose the connection to the router as the original SSID will have disappeared. You just need to locate the new SSID, enter your router password again and voila.