I believe I responded to your query via the Support Portal last week. I recommended that you contact Microsoft Support instead, as they would be better equipped to analyse the German Event Logs that were sent to us. Did you do this? 
We do want to help you! The problem is, we can’t do much with the Windows Event Viewer logs that were received, especially considering they weren’t in English. 
Vermintide 2 operates in protected memory and would never be able to directly crash your PC, but due to it’s demanding nature it can highlight an instability in a component - subsequently leading to your PC crashing - which I believe is the case here.
Especially considering you experience this not only in Vermintide 2 but in Jump Force too, a hardware problem is likely (but unfortunate) reality. In all honesty, your best bet would be to take your PC to a repair shop. From an online support perspective, it’s very hard to determine what could be the cause without having the PC physically in our hands. I hope you can understand.
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