Thanks for your replies. TeamViewer can not be used when running Memtest

. And a MEMtest is useless. I prefer Prime95, it was a tip from someone else. It will stress Chipset, RAM and CPU till it cooks. Sinse it is an INTEL system, it won't harm the system. It Prime95 runs 2 hours and there is no freeze or display glitches or other glitches, Photoshop is the problem.
I wonder why so much people are clearing their bank account for this crappy, inefficient piece of fucking software! My firend is really acid and mad! Meanwhile he is calling the service center. Hope it is open at this time of day and on a sunday...
HDTune is still running... He put a big fan on the open case because in germany we currently have ~25°C and the sun was cooking the roofs so he has 30°C in his loft.