Playing the sims 3 whitout a cd ( NO piracy)

Hi!

I have recently bought the sims 3 and I have two computers. I want to play it on the computer with the best graphics card but it has no cd drive. ( it's strange but I didn't buy it :P) I have put it on the computer with an USB, i have the original copy,cd key and have done a registration of the game so it's is no piracy. But when i try to play it says ( Excuse my english, I come from sweden 😉) "Can't recognise original cd" and then it closes down. Is there any solution to this?