Quote - My internet connection is not working properly.
The program that installs it says that there are 5 NICs and I need to get rid of some.
How do I remove a NIC?
I don`t even know what a NIC is.

A NIC is a Network Interface Card.
Some of the one you have defined are probably virtual devices.

You should be able to uninstall them from the Device Manager.
Take appropriate precautions before tinkering.