The place to go for the graphics adapter's driver package depends on your PC configuration:
a) If it's an on-board (integrated) graphics adapter on a laptop or factory-built PC, download it from your laptop or PC manufacturer's website.
b) if it's a PCI/PCIe add-on graphics card, download it from that card manufacturer's website.
c) if it's a custom-built/home built computer with integrated graphics adapter, download it from the motherboard manufacturer's website.