All was working on Win8.1 PREVIEW (with no A/V).
After reformatting with Win8.1 RTM (legit from MSDN) and with AVAST A/V, it isn't working.
The installer got some errors due to the A/V, but AI Suite actually was working afterwards. When I disabled A/V and re-installed AISuite is when things really broke.
However, I've disabled AVAST and I can't get AISuite cleaned up and re-installed. The cleanup tool says it's removed the services, but every time I re-install it, and reboot, I get the Create Process error, even if Avast is completely disabled.
I believe the problem is that AI Suite is not fully uninstalling and re-installing, but I don't know how to clean it up as I've already run the cleaner with and without rebooting.
Again, I've tried completely disabling Avast; I don't think it is the only problem.