Update: Still the same problem in Win8.
I have installed Windows 8 Release Preview on my main computer, and VEpro 5 has been stable with no crashes for 2 days now.
So for those who are in the same boat, this might be worth checking out. I have not had any other problems, other than that i had to re-install the e-licenser software after the upgrade to Win8.
For me everything else is working right out of the box, iLok, Cubase 6.5, RME drivers aso. Also freed up a bit of HD space after running the disk cleanup tool, removing the old windows install and old windows install temp files, and a bit more free RAM.
I am a happy music maker once again :)
Tho Windows 8 is still in beta/pre-release or what one would call it, i have not had any issues yet, but you can not roll back to windows 7 once you update.