If you are using an USB keyboard, then it should just be plug-and-play. Just plug in the keyboard in an empty USB slot and your operating system should automatically install the drivers for it. If not, it will ask for the driver. You will find it on the CD that came with the keyboard.If you are using a PS2 keyboard with an USB adapter, you should plug in the keyboard when your laptop is turned off. If you plug it in when it is running, there are almost no chances for that external keyboard to be recognized.