Navigate to the "Downloads" or "Drivers" section on the Ethernet controller information page, if needed. Save the driver file to your computer.

Broadcom supplies Ethernet controllers to the computer industry's leading PC OEMs and add-in card manufacturers. Broadcom offers the below reference drivers as a courtesy to end users. Broadcom ...

This post explains the function of the Standard SATA AHCI Controller driver & provides instructions on how to download the driver on PC.