Unable to update to 1.6 on Windows Server 2016

I never had a problem updating before but today I havent been able to update my RoonServer running on a Server 2016 machine. The downloading progress bar progresses very slowly until it gets stuck at around 25% complete. I was able to update a laptop running Windows 7 though.
Any ideas?

Hi @tboooe,

Can you try to reboot your Core and Networking Gear to see if that helps?