Internet Explorer uses HTTP/1.0 GET requests instead of HTTP/1.1 GET requests to connect to a Web site in Windows XP

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Article ID: 947513 - View products that this article applies to.
Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
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Symptoms

You install hotfix 904710 for Windows XP Service Pack 2 or Windows XP Service Pack 3. When you use Internet Explorer to connect to a Web site, the trace analysis of the connection may indicate that Internet Explorer is sending HTTP/1.0 GET requests instead of sending HTTP/1.1 GET requests.

This problem occurs even when you enable the Use HTTP 1.1 option and the Use HTTP 1.1 through proxy connections option in Internet Explorer.

For more information, click the following article number to view the article in the Microsoft Knowledge Base:
904710 WinINet ignores the policies that you set when you create a custom administrative template file in Windows XP with Service Pack 2

Cause

This problem occurs because of a design change in how the Wininet.dll file reads the values of the Use HTTP 1.1 option and the Use HTTP 1.1 through proxy connections option as a policy. In this case, the Security_HKLM_Only registry entry is enabled. This design change does not consider the effect of the Security_HKLM_Only registry entry. When the Security_HKLM_Only registry entry is enabled, the default settings for the Use HTTP 1.1 option and for the Use HTTP 1.1 through proxy connections option are set to be disabled. By default, the EnableHttp1_1 registry entry and the ProxyHttp1.1 registry entry do not exist. Therefore, when the Wininet.dll file tries to read them in the registry, the values of these registry entries are determined to be turned off.

The Security_HKLM_Only registry entry is stored in the following registry subkey:
HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings

This behavior change started with the hotfix that is included in Microsoft Knowledge Base article 904710. The behavior was implemented in the following version of Wininet.dll:
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NameDateTimeSize
Wininet.dll21-Jul-2005 21:15 6.0.2900.2723 660,480

Workaround

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To work around this problem, manually add the EnableHttp1_1 registry entry and the ProxyHttp1.1 registry entry to the
HKEY_LOCAL_MACHINE
registry subkey. To do this, follow these steps:
  1. Click Start, click Run, type regedit, and then click OK.
  2. Locate and then click the following registry subkey:
    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Internet Settings
  3. On the Edit menu, point to New, and then click DWORD Value.
  4. Type EnableHTTP1_1, and then press ENTER.
  5. Right-click EnableHTTP1_1, and then click Modify.
  6. Type 1, and then click OK.
  7. On the Edit menu, point to New, and then click DWORD Value.
  8. Type ProxyHttp1.1, and then press ENTER.
  9. Right-click ProxyHttp1.1, and then click Modify.
  10. Type 1, and then click OK.
  11. Exit Registry Editor.
Note By default, the two registry entries will be added.
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.

Properties

Article ID: 947513 - Last Review: June 21, 2014 - Revision: 1.0
Applies to
  • Microsoft Windows XP Professional
  • Microsoft Windows XP Home Edition
Keywords: 
kbexpertiseinter kbtshoot kbprb KB947513

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