Vista : Disable TCP Window Scaling

TCP Window Scaling is a feature of Vista (& Windoze 2008 next year) that allows the intelligent use of a larger packet size when transferring data between hosts that support it.

The trouble is, not many hosts support it and some routers also dont like it.
The end result is people experiencing slow networking on Vista.

Turn it off like this (from Administrator command prompt) >

netsh interface tcp set global autotuninglevel=disabled

Check the status like this >

netsh interface tcp show global

A nice pretty screenshot >