Nov 13, 2010 Disable Autotuning on Vista / Windows 7 / 2008 Server November 13, 2010 / 3 Comments This autotuning fix is definately something to try if you are experiencing slow network/internet speeds in Vista / Windows 7 or 2008 server. Sometimes it is helpful to disable Windows Vista's autotuning of TCP/IP. Some networking devices, such as SPI firewalls, some NAT routers, VPN endpoints, WiFi devices have problems with the way Windows Vista resizes the TCP Window.

The Receive Window Auto-Tuning feature lets the operating system continually monitor routing conditions such as bandwidth, network delay, and application delay. Therefore, the operating system can configure connections by scaling the TCP receive window to maximize the network performance. To determine the optimal receive window size, the Receive Window Auto-Tuning feature measures the products that delay bandwidth and the application retrieve rates. Then, the Receive Window Auto-Tuning feature adapts the receive window size of the ongoing transmission to take advantage of any unused bandwidth.

While the feature may improve speed, in some cases it can also cause problems and slow down the network.

To disable the feature, use this command:

To see if the feature is enabled or disabled, use this command:

To enable the Receive Window Auto-Tuning Level, use this command:

Here’s a list of available options for the autotuning parameter: Dev c how to replace with iphone.

Disable Auto Tuning Windows 7 Free

Auto Tuning Windows

disabled: Fix the receive window at its default value.
highlyrestricted: Allow the receive window to grow beyond its default value, but do so very conservatively.
restricted: Allow the receive window to grow beyond its default value, but limit such growth in some scenarios.
normal: Allow the receive window to grow to accommodate almost all scenarios.
experimental: Allow the receive window to grow to accommodate extreme scenarios. WARNING: This can dramatically degrade performance in common scenarios and should only be used for research purposes. Hazel alternative mac.