FOR VISTA USER
"TCP Optimizer does not work with Vista", however there may be some tips to speed your internet connection on Vista.
MUST DO A TIPS BELOW
1. Tweaks for firefox >>
http://amenapster.blogspot.com/2008/09/make-firefox-browser-run-at-full-speed.html (Please note:Don't use any other speed accelerator for your browser after apply this tips except TCPOptimizer)
2. Gpedit tips >>
http://amenapster.blogspot.com/2008/09/how-to-speed-up-your-broadband-internet.html
3. Use a Ccleaner to clean your pc >> http://www.filehippo.com/ (Browse for Ccleaner then download)
EXTREMELY IMPORTANT!!!
Download, update and scan with SpyBot S&D & Ad-aware to remove any spyware then install and update SpywareBlaster to stay spyware FREE. YOU MUST USE BOTH AD AWARE & SPYBOT TO ENSURE YOU ARE SPYWARE FREE SINCE ONE FINDS WHAT THE OTHER MISSES. Spyware can and will ruin your connection and crash your pc!
see Philip's article on Windows Vista Tweaks:
http://www.speedguide.net/read_articles.php?id=2574
After read those article, not to try autotuning disabled because can make your RWIN scaling = 0 and set autotuning to normal.
Run Analyzer and speed test and post the results.
Open command prompt and run netsh int tcp show global and copy/post results.
This is what I get, yours should be similar.
C:\Users\nApStEr>netsh int tcp show global
Querying active state...
TCP Global Parameters
----------------------------------------------
Receive-Side Scaling State : enabled
Chimney Offload State : disabled
Receive Window Auto-Tuning Level : normal
Add-On Congestion Control Provider : ctcp ( may be none)
ECN Capability : disabled
RFC 1323 Timestamps : disabled