There is a thread on how to get the trackpad back working again.
The 8 DP was September - very recent. CP came in an upgrade using a Setup.exe or better method is to download the ISO and do a clean install. An upgrade from 7 to CP also works but does not run as well or smoothly.
So check the forum for "Winidows 8" threads again.
I prefer 8 rather than even use 7 now with the CP version.
Download the ISO from Mac, burn to DVD, format when you install.
Windows 8 CP creates a larger 350MB system reserved needed for booting in addition to normal partition (it will create it just as Windows 7 used 100MB)