The latest Intel Chipset Windows driver for Windows 8 is version 9.4.0.1017 (Released 2013-02-27).
This update isn't actually a Windows 8 driver, it's a collection of INF file updates which help Windows 8 properly identify Intel chipset hardware like USB controllers and other hardware integrated on Intel motherboards.
This single update works with both 32-bit and 64-bit versions of Windows 8.
