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**sidney1st** · 05-13-2008

As far as i know, the vista registry has many of the tcp settings present in XP but they are set to FF hex value and revert back to that value if you change them.
The Tcp Window Size in Vista is based purely on AutoTuning being either on or off, and there is no registry entry to use.
So, with regards to the Microsoft TCP/IP Registry Values for Windows Vista and Windows Server 2008, i hope it is a mistake (copy/paste from ex versions) though it's been updated early this year. (for example same difference with TcpUseRFC1122UrgentPointer)

05-13-2008	#2 (permalink)
sidney1st Member	Re: That is a bug in Vista? As far as i know, the vista registry has many of the tcp settings present in XP but they are set to FF hex value and revert back to that value if you change them. The Tcp Window Size in Vista is based purely on AutoTuning being either on or off, and there is no registry entry to use. So, with regards to the Microsoft TCP/IP Registry Values for Windows Vista and Windows Server 2008, i hope it is a mistake (copy/paste from ex versions) though it's been updated early this year. (for example same difference with TcpUseRFC1122UrgentPointer)