Updating bootcamp without re-installing Now that the 10.8.3 update is out for Mountain Lion with Windows 8 support, I would like to update my existing Windows 8 installation (upgrade from 7) to have the new drivers without re-installing Windows.

Does the Apple tools in Windows handle the update or is there a process that I must follow?

The reason for wanting to update the drivers to get newer graphics drivers specifically.
Run boot camp on your Mac and download the updated Windows Support files. Once downloaded, install them on your Windows PC as you normally would.