TCP error code 10061: No connection could be made because the target machine actively refused it 127.0.0.1:8867.

I am using WCF service in my application and it was good until yesterday. Suddenly it stops to work after recent windows (I am using Windows 10) update. It throws following error.

TCP error code 10061: No connection could be made because the target machine actively refused it 127.0.0.1:8867.

I couldn’t find much help from Internet and after a long struggle I managed to resolve it.

After my windows update, the Net.Tcp Listener Adapter (NetTcpActivator) service got turned OFF. After I turn it ON, then my application started to work without any issue.

I hope this post will help to someone who really struggle about this issue.