in the last days i noticed sometimes a command-window opened up and closes immediately.
I was not able to see the content and since now i was not able to reproduce.
Because of that i ran MWB and it found a WOW6432Updater.
By searching for that i found the post of a user with the same problem.
https://forums.malwarebytes.com/topic/241531-wow6432node-updater/ I did the workaround from kevinf80's first answer and hope anybody can help me now, that im safe for now.
I hope its not a problem, that my programs run on german.
Thank you very much in advance!