In order to get the required driver you need to identify the model and the version of your Pavilion. You can do this by opening the protecting case, if you're using a desktop version, and look on the motherboard for the correct name or look on on the sticker at the back of the laptop. There you will find the version of your laptop. Simply copy that and paste it into Google and usually the first results will lead to your device where you can download drivers and such.