If your friend had a custom build computer, I'd ask them to help you. The card you removed is clearly not a video-card, it looks likes an ethernet card, or modem card, or maybe even a sound card.
From what you've said, after adding the new card (which is an AGP card looking at the connectors) your computer didn't recognize it. I've never had that problem, after installing a new video card, all the computers I've had have recognized it and either installed the new drivers if it's plug and play, or asked for an install disk. So if you already have an intel integrated graphics card, and it's not recognizing it, I have to assume you've just hammered the new card into a slot where it's not supposed to go, or you haven't hooked up the power cables correctly.
And in the end, if you look at the video card, it has a little plastic tab on the side. That helps to connect it to the proper AGP connector. If you didn't have to remove a card to put the new card in place, you're putting in the wrong place.
Computers usually haven't come with AGP slots since 2006, you can get them, but PCIe has replaced them. It sounds like you're trying to do something that your motherboard won't allow you to do, and I'm pretty sure if you managed to cram that AGP card in any port, the port is ruined.
In the end, not all cards will work with all motherboards. Without seeing your motherboard, I can't tell you if it will take PCI, PCIe, or AGP cards. But from the info you've given, it doesn't sound like this card will work. Especially when the information is "It's not too old, but it's not too new".
Last edited by Jello on 12-03-12 at 09:52