you've continued to post the same question but are ignoring what people are responding. So I guess I'll have to repeat it again
Here in North America if you want to subscribe to programming that is scrambled, you MUST MUST MUST use their receiver. This goes for Dish, Directv, Bell, Shaw, Globecast, Dish Mexico, Claro, Sky Mexico. The providers WILL NOT authorize anything but their receiver. Also some of these do not use a smartcard (shaw being one) or its embedded on the motherboard (as Dish is now)
In other parts of the world it is different. They CAN use CAM slots and subscribe to programming with their own receiver
But since you are in North America the 1st part is all you need. You can get free to air programming with that pc box you are referring to