This value controls how often TCP attempts to verify that an idle connection is still intact by sending a keep-alive packet. If the remote computer is still reachable, it acknowledges the keep-alive packet. HKLM\System\CurrentControlSet\Tcpip\Parameters\KeepAliveTime Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\MSS: (KeepAliveTime) How often keep-alive packets are sent in milliseconds (2) REG: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters!KeepAliveTime