|If you're not getting anything from HP it's beacuse you are not searching with the Full Model ID #.|
C731TU denotes a Family/group of Notebooks .
Go to the link, take note of the text in RED on the right side as well as the Battery Pack Recall program.
Click on the RED text & you'll be directed to the instructions for Identifying your EXACT Laptop. then you can locate the Drivers.
There is nothing to learn from someone who already agrees with you.