i have a local cable internet connection(no modem,no router) which i plug in the back of my computer and its all set.now,it is for my desktop but when i insert that cable in my laptop.,it says username and password incorrect.i called up my ISP and he said i can use my internet only on my desktop and not on any other computer.is there a way out of it? can i use that internet on my laptop somehow? i dont wanna use the internet on both(laptop and desktop)so im not asking for something complicated.plz help