The LynxPoint SATA Controller 1 (AHCI) - 8C02 is a driver for the Serial ATA (SATA) controller built into Intel chipsets, specifically for systems using the Lynx Point family of chipsets (such as Intel's 8-series chipsets). AHCI (Advanced Host Controller Interface) is a technical standard defined by Intel for the operation of Serial ATA (SATA) devices, such as hard drives and SSDs, in a more efficient way, allowing for features like Native Command Queuing and hot swapping.

In essence, the LynxPoint SATA Controller 1 driver enables Windows to properly communicate with and manage the SATA devices (such as hard drives or SSDs) connected to your system via the LynxPoint chipset, ensuring stable and fast data transfer.