|The webcam should be already set up when you get the pc, so it depends on what you want to use it for. So if you want to install & use (for example) Skype, when you install the program it will realise that you have a webcam and it will use it without you having to do anything. You may have other software already on the machine and that will make use of it as & when it is needed in the same way.|
If this doesn't answer your question then you will need to explain exactly what it is that you want to do with the webcam.
"I've always been mad, I know I've been mad, like the most of us..." Pink Floyd