Go to your official laptop manufacturer website and download the drivers they have, put it on a flash drive, and install it off the flash drive. If you can't locate it, call customer support and have them help you locate those drivers. If you only have missing drivers, its only a matter of finding correct drivers for your computer, and like others have said, there are some compatibility issues between laptops and desktops.
If your going to try it at all, better do a bunch of research on it, and then end up buying parts for the pieces you can't salvage.