HiLatty86,
Welcome to the HP forum!
Thank you for your query, I will try my best to help.
I grasp that after installing an update you have no sound. Here is a link to No Sound from the Speakers (Windows 7) that may help. If this is not resolved and you would like additional assistance, would you provide the exact model of Envy Touchsmart 15 you have, How Do I Find My Model Number or Product Number?, the operating system you are running and if it is 32 or 64 bit.