Why autotuning may slow your computer down

First off, how does the Receive Windows Auto-Tuning work?    This feature basically lets Windows monitor the routing conditions in your network.   Conditions can be things such as application delay, network delay or actual bandwidth.  This allows connections to be configured by Windows thus scaling the TCP receive window to take advantage of your network performance.

This seems like it could be a great feature.   Here’s the catch.  If the Receive Windows Auto-Tuning feature is enabled for your HTTP traffic, some older firewalls, routers or even older operating systems may cause a slow data transfer — even if the devices are beyond your organizations, WAN, LAN or network.  Microsoft notes that this issue (latency) will remain.

So how can you disable this feature?  Open a command prompt as an administrator.  Type the following in the open window:

netsh interface tcp set global autotuninglevel=disabled



Reboot your computer





Link – Although this says Vista, disabling Autotuning may improve performance – even on Windows 7


About TCAT Shelbyville IT Department

The Tennessee College of Applied Technology - is one of 46 institutions in the Tennessee Board of Regents System, the seventh largest system of higher education in the nation. This system comprises six universities, fourteen community colleges, and twenty-six Applied Technology Colleges.
This entry was posted in Information Technology, network, Networking, Windows and tagged , , , . Bookmark the permalink.

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