Many Thanks - That did it.
It can be very easy sometimes.

Problem solved

Add a custom rule at the windows firewall. Choose the program and in the scope section of the rule specify the ip ranges that you don't want the program to send packets. like: 0.0.0.0 - (IP address...

Thanks Ed, that's the one I meant

Hello!

I got a problem with my Windows 10 / Windows 7 dual boot system.

The boot loader does not come up every time. It depends on what I did before.
Shut down Windows 10 -> boot loader does...

wasn't there a Windows update recently that caused a problem with the internet connection.
Do you use a static or dynamic assigned IP address. What does ipconfig say?