I came across this thread after a Google search and would like to provide extra info:
The main TCP Optimizer settings (RWIN) will not affect Windows Vista/7/2008 ... So you will not see a drastic difference as with XP/2k3/9x.
However, there are some additional registry settings that still work, so you may see some marginal improvement.
We do not recommend using the Optimzer under Vista/7/2008. Instead, we have a TCP patch and a tweaking article on the main site, see:
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www.speedguide.net/read_ ··· ?id=2574»
www.speedguide.net/downl ··· hp#VistaSource: »forums.speedguide.net/sh ··· 87600%29Personally, I wouldn't fiddle with it; it's waaay too much work to be bothered for a
marginal improvement...unless you enjoy playing with these settings.