The TCP Optimizer is a free, easy Windows program that provides an intuitive interface for tuning and optimizing your Internet connection. There is no installation required, just download and run.
The program can aid both the novice and the advanced user in tweaking related TCP/IP parameters in the Windows Registry, making it easy to tune your system to the type of Internet connection used. The tool uses advanced algorithms, and the bandwidth*delay product to find the best TCP Window for your specific connection speed. It provides for easy tuning of all related TCP/IP parameters, such as MTU, RWIN, and even advanced ones like QoS and ToS/Diffserv prioritization. The program works with all current versions of Windows, and includes additional tools, such as testing average latency over multiple hosts, and finding the largest possible packet size (MTU).
The TCP Optimizer is targeted towards broadband internet connections, however it can be helpful with tuning any internet connection type, from dialup to Gigabit+.
TCP Optimizer 4 works with Windows XP, 7, 8, 8.1, 10, 2012 Server, etc.
Changes in TCP Optimizer 4.1.0:
Changed the Windows 8/8.1 command for InitialRTO to netsh (PowerShell cmdlets don't have sufficient permissions to change the value for the Internet template)
Updated Windows minor versions detection algorithm
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