On my Laptop (DELL Latitude E5530) with a completely fresh Windows 10 Enterprise installation any TCP connection gets disconnected after close to exactly 30 seconds. I noticed it first when Skype for Business lost its connection over and over again. I am able to reproduce the fault using any program that uses the network connection. E.g. PuTTy will stop to display the output of an ongoing ping after 30 seconds. Wireshark running on my machine shows several retransmissions and duplicate acks for the moment the problem occurs. The connection is then dropped. Other systems on the same network switch/network don't experience any problem.
Let me know if you want me to provide any log data or pcap traces.