Microsoft KB Archive/929868

= A Web site sends data very slowly or drops the data completely when you use Windows Vista Enterprise =

Article ID: 929868

Article Last Modified on 10/16/2007

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APPLIES TO


 * Windows Vista Enterprise
 * Windows Vista Business
 * Windows Vista Home Basic
 * Windows Vista Home Premium
 * Windows Vista Starter
 * Windows Vista Ultimate

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SYMPTOMS
When you use Windows Vista Enterprise to try to access a Web site, the Web site sends data very slowly or drops the data completely.



CAUSE
By default, Windows Vista Enterprise fully supports RFC 1323 and supports a Windows Scaling factor of 8. This issue occurs when a Web site does not fully support RFC 1323 or when a Web site does not support the default scaling factor.



WORKAROUND
To work around this issue, change the Windows Scaling factor to 2. To change the Windows Scaling factor to 2, follow these steps:  Click Start, click All Programs, and then click Accessories. Right-click Command Prompt, and then click Run as administrator. At the prompt in the Administrator: Command Prompt window, type the following command, and then press ENTER:

netsh interface tcp set global autotuninglevel=highlyrestricted

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MORE INFORMATION
For more information about RFC standards and Windows Scaling, visit the following Microsoft Developer Network (MSDN) Web sites:

Windows TCP implementation features:

http://msdn2.microsoft.com/en-us/library/ms819768.aspx

Win32 and COM Development:

http://msdn2.microsoft.com/en-us/library/ms741621.aspx

For more information about RFC 1323, visit the following Internet Engineering Task Force Web site:

http://go.microsoft.com/fwlink/?linkid=6746

Keywords: kbtshoot kbprb kbexpertiseinter KB929868

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