Note: This update is not applicable to Windows XP (DirectX 8.1 is built in) or DirectX 8.1 downloads. All required files have been updated and included in those releases.
Users of video capture devices should install this update after installing the DirectX 8.0 or 8.0a runtime. Video capture devices include:
TV tuner and video capture cards/peripherals (AGP, PCI, USB, or IEEE 1394).
Digital Video (DV) devices connected to OHCI-compliant IEEE 1394 ports.
Here's other similar drivers that are different versions or releases for different operating systems: