How to speed up vista?

Those who stuck with a 2007 machine with official vista might want this tweak which
makes your computer fast by a whole lot!

Try this

Control Panel
- Programs and features
- Turn on or turn off Windows features
- uncheck "Remote Differential Compression"

You might want to update your video driver too

as for network

use this two

Start
-Run
-CMD

type both of these

netsh interface tcp set global rss=disabled
netsh interface tcp set global autotuninglevel=disabled

Source
http://mytechweblog.blogspot.com/2007/04/slow-file-copymove-in-vista-here-is_05.html