I've seen the same thing, when modern mix installs, both that and start 8 fails to run. In services.msc, both go from auto to manual and will not start automatically. If I set start 8 to auto run alone, it will work, but modern mix of course would be disabled. As soon as I set modermix to auto run, then next time I reboot, the computer will log on, automatically log off, then I log on again, both have gone back to disabled. Something is definitely not working. System works fine on bootcamp, but not on parallels.
