Cannot start MinimServer on a Win10 PC

[Hubert]

Hello Simon,
since I installed Windows 10 on my notebook I run MinimServer (64-bit) without any problems. Now I tried to install it on a Windows 10 desktop and it refuses to start. The OS shows a message something like this (translated from my German surface):
"How should I open this file? Look for an app in store?"
Wondering if there was a difference between the notebook and the desktop installation I noticed that my nb uses jre-8u73 and the dt jre-8u77. Could this be the reason for the problem and is there a workaround to get MinimServer running on the dt?
Hubert
(I reinstalled Java, Jre and MinimServer at least 3 times without any success)