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

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Article ID:929868
Last Review:October 16, 2007
Revision:1.2

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.

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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.

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WORKAROUND

To work around this issue, change the Windows Scaling factor to 2. To change the Windows Scaling factor to 2, follow these steps:
1.Click Start, click All Programs, and then click Accessories.
2.Right-click Command Prompt, and then click Run as administrator.
3. 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 (http://msdn2.microsoft.com/en-us/library/ms819768.aspx)
Win32 and COM Development:
http://msdn2.microsoft.com/en-us/library/ms741621.aspx (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 (http://go.microsoft.com/fwlink/?linkid=6746)

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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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Keywords: 
kbexpertiseinter kbtshoot kbprb KB929868

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