After some days of trying out things I have solved my problems. The cause was quite unusual, it´s the usb dongle hub combination that caused all this. I had a “dongle hub” with elicenser, ilok, ilok2 and ssl codemeter dongle connected to my main usb hub. I then connected the dongle hub directly to a usb-port of the pc and the problems were gone after reinstalling everything. needle in the haystack.