Vista introduces a new feature called “Receive Window Auto-Tuning”. What it does is to adjust the receive windows size continually based upon the changing network conditions.
Some people reported that auto-tuning cause network time-out problems with some applications and routers. You can turn it off if you have experienced such problems.
Open up a CMD window with Run as Administrator and enter the following command to disable auto-tuning
netsh interface tcp set global autotuninglevel=disabled
If you found that this doesn’t fix your problem, you can turn it back on.
Open up CMD window Run as Administrator and enter the following command to enable auto-tuning
netsh interface tcp set global autotuninglevel=normal
You can use this command to view the states of the TCP global paremeters.
netsh interface tcp show global
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