I did install OpenCV on a fresh Raspbian. My programs need the "extra modules", so I had to compile them too. I installed my VM too. Now the control program runs again.

I now have to install Jasper for voice recognition. This time I made a backup of the SD card. So if anything goes wrong then I am on the safe side.

I added A heatsink onto the big chip on the Raspberry Pi 3. It got hot while compiling OpenCV. Now it is better with the heatsink installed. My control programs can reach up to 80% CPU time and I need this cooling then.