I have almost exactly the same problems as Dominik.
Tried with DVD setup and Internet setup. Tried installing Ubuntu first, then updating NVIDIA driver to 190.42. On Ubuntu everything works fine but when I install LinucMCE I get extremely long startup-times that can often not be distinguished from failing startup, expecially since the screen turns black and I can only catch short glances pressing Numbers like 0. A/V Wizard is no solution.
There are a lot of other subjects on the forum with similar problems but they have not been any help - so far.
I have spent 10 to 20 hours so far. Very frustrating.
I am a Linux beginner but have plenty experience with windows, databases, css, html and visual basic.
Any help would be extremely appreciated.