No, you will just have to install some new drivers. It's like installing a program. By security I meant a card that will last you a good bit of time. It's currently overkill for your computer now, but if you ever upgrade to a large screen or to a better computer, you won't have to buy a new card.
2.13Ghz Intel Core 2 Duo-2GB DDR2 800 Mhz-500GB Western Digital Caviar Blue- Nvidia 9400M