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Receive Window Auto-Tuning Level cannot be changed from highlyrestricted in SP2

• Friday, June 05, 2009 2:08 PMdcaUK

   
  

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  I am running vista 64 home premium and have been suffering from bad internet speeds that i did not get when using a different system running xp...i have tried a lot of tweaks to boost the speeds but have never really been able to get maximum speeds like i could on my old system...
  
  i managed to get a reasonable speed by doing a couple of tweaks with the tcp global parameters
  
  anyway here is my problem
  
  the one that made a most of a change was the 'recieve window auto-tuning level' that i had previously been able to change using a command rompt run as admin...i had set it to normal and my internet speeds seemed improved.
  
  i upgraged to SP2 and on doing so my download speeds dropped by around 2Mb/s i checked my tcp global parameters just to see if they were still the same and to my suprise the  'recieve window auto-tuning level' had changed to 'highlyrestricted i tried to change the setting to normal using command prompt as admin...i got the ok and checked again, the setting was still set at highlyrestricted, i also tried disabling it using the command prompt...nothing changed, even when rebooting my machine.
  
  I guessed that it was possibly due to the SP2 so i uninstalled it...as soon as i did the settings could be changed again and speeds increased...just to make sure it definatly was the SP2 i installed again ton find the settings highlyrestricted yet again...
  
  how can i fix this problem without uninstalling SP2... it is it seems that this is causing my slower connection everytime i install the update
  
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