Moved to Computers and IT forum
shigilyboohoo,
to cableforum.
How are you connecting to the NTL network?
If it's via a bt phoneline and ADSL, you would have been sent a letter with your username and password when you joined. If you don't have these, you may need to call customer services.
If it's via a cable connection and via your STB, then you need to "register" your PC with the Set Top Box. Then you can get your router to clone your PC's Mac address (all routers can do this).
If it's via a seperate cable modem, then you don't need a user id or password.