You have a CPU (looks like Pentium G620) with 2nd gen Intel HD Graphics. No drivers available for that hardware for Windows 10 - http://www.intel.com/support/graphics/sb/CS-034343.htm . Try to disable hardware acceleration in PowerPoint settings.
Hello, thank You very much for the hint. It seems to be the problem. Hardware acceleration was already disabled. Microsoft claims to have solved the problem with their driver, but I had 3 shutdowns in one week. It seems that I have to go back to windows 7. Anyhow, thank you agin.
Thanks for sharing your results.