The Net.Tcp Port Sharing Service provides the ability for multiple user processes to share TCP ports over the net.tcp protocol. This service supports the .NET Framework 3.0 Windows Communication Foundation (WCF), which provides a new TCP-based network protocol (net.tcp://) for high-performance communication. This service allows a net.tcp port to be shared and secured in a similar fashion as port 80 is for HTTP traffic. Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\System Services!Net.Tcp Port Sharing Service (2) REG: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\nettcpportsharing!Start