Hi Naresh ,
Thanks for your advice,
Actually I fixed it - something of a "did you try to turn it of and on again moment" - I connected an external screen to my laptop and it all worked fine.
I did do some parallel changes though (turned off the "Hardware-accelerated GPU scheduling" and restarted) however I tried that before and on the laptop screen it didn't help.
Let me know if you want me to try to get a better description of this if it has anything to do with the known error with Dell Precision 7550.
So now I'm all set and looking forward to try the software.
Have a good day.