I thank everybody who helped me in this forum. I talked to a friend ("wise in the ways of computers") and he solved the problem as follows:
- My notebook has two VGAs for running 3D: Intel HD Graphics and Nvidia GeForce.
- For running, my notebook uses the GeForce. It is the real muscle here.
He dowloaded the GeForce 820M Latest Driver on a clean installation (it cleans the house for a fresh start). Going to the control panel of Nvidia GeForce, the setting was changed to use GeForce as the primary one. In Global Settings, the Nvidia processing in high performance was chosen and in Program Settings, after findin the game in the list, apply the rule "use global setting (Nvidia processing in high performance)".
Thanks again and Peace through Power!