Windows 8 on a Macbook Pro

Having trouble getting your trackpad to work on Windows 8 RTM with your Macbook? This fix worked for me, via LeeR @ ArsTechnica.

Right Click | Update Driver Software | Browse my computer for driver software | Let me pick from a list of device drivers on my computer

I then selected USB Input Device. (It was the only other device in the compatible hardware list).

Doing this for each one restored basic mouse functionality. No multi touch at this stage, no right mouse click.

After that I did the following:

Right Click | Update Driver Software | Browse my computer for driver software | Let me pick from a list of device drivers on my computer

I then selected the relevant Apple Multitouch driver. (This again was the only other device in the compatible hardware list).

and it works.

You might need to go into the Boot Camp Control Panel and tick boxes in the Trackpad tab to get things back how you wanted it.