Toshiba Satellite Pro L40/Satellite L40/Equium L40 Realtek Lan Driver 18.104.22.1687 Windows Vista. This driver offer the possibility to establish a high-speed connection to a network, to another PC (peer-to-peer connection) or to the Internet by using your internal network card.. Do use the latest driver version available, it will help you use the facilities of your hardware easier and better. An old version can create hardware conflicts and errors in function. Try to stay updated with your drivers monthly or sometimes weekly. Chose wisely the specific drivers: motherboards driver, bios, graphic cards drivers, modem drivers and so on. Chose the right driver for your hardware and try to make backups of your system every time you want to make a change.