"broadcom virtual adapter driver 6.2.35" is neither a sound chip model number nor a sound chip number.... one of which is required to help you. Please open Device Manager, find and double-click the sound device, click the Details tab, select "hardware id" and give me the hardware id string that begins with "PCI\VEN" or "HDAUDIO", (1st./top line of text only).
Listing the computer brand and model would also be helpful as would stating whether it's a desktop or laptop pc. Give us something to work with.