TCP Optimizer is a free, easy to use Windows program that helps tune and optimize your Internet connection. The program can help both the novice and advanced user change related TCP/IP Netsh and Registry parameters, such as the TCP Receive Window, MTU, even QoS and ToS/Diffserv prioritizatioin. There is no installation required, just download and run under any current Windows OS. To use, simply apply the optimal/recommended settings and reboot.