Thanks. That's weird. I was assuming it had something to do with language setting, because many people with the issue on forums were Germans and when installing some apps, they would install in english as standard language for me while an other international app even caused problems finding correct language files. In a previous WIndows installation that I did, it even set the language to English automatically at a certain point. So something was going on with languages.
The really strange part in my opinion is, that reinstalling a clean Windows installation doesn't fix the problem. It would reappear every time I install Windows on this machine. And that's what other users also say. Weird is indeed, that until now, every person with the problem I asked had an AMD processor. And since I am assuming, there's only like 10 or 20% of people using one, this is quite a coincidence.