Service pack informationTo resolve this problem, obtain the latest service pack for Windows Vista. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
Hotfix informationA supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
PrerequisitesThere are no prerequisites for installing this hotfix.
Restart requirementYou do not have to restart the computer after you apply this hotfix. However, you must restart the computer after you set the TcpAutoTuning value in the registry, as described in the "How to enable the hotfix" section.
Hotfix replacement informationThis hotfix does not replace a previously released hotfix.
File informationThe English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
Windows Vista, 32-bit versions
|File name||File version||File size||Date||Time||Platform|
|Update.mum||Not applicable||2,002||21-Jul-2007||12:26||Not applicable|
|X86_2d1491e2ae43efd26100d561613492f5_31bf3856ad364e35_5.1.6000.20645_none_2736f6926c773ef7.manifest||Not applicable||695||21-Jul-2007||12:26||Not applicable|
|X86_microsoft.windows.winhttp_31bf3856ad364e35_5.1.6000.20645_none_234b176fde366423.manifest||Not applicable||41,451||21-Jul-2007||12:26||Not applicable|
Windows Vista, 64-bit versions
|File name||File version||File size||Date||Time||Platform|
|Amd64_75e3d8c57636d929b14b0fd81e564298_31bf3856ad364e35_5.1.6000.20645_none_5a47331b95817f45.manifest||Not applicable||699||21-Jul-2007||12:26||Not applicable|
|Amd64_a4e35a0d49d382441a36095e8e8f362a_31bf3856ad364e35_5.1.6000.20645_none_232aa5bf7a8f5cf6.manifest||Not applicable||699||21-Jul-2007||12:26||Not applicable|
|Amd64_microsoft.windows.winhttp_31bf3856ad364e35_5.1.6000.20645_none_7f69b2f39693d559.manifest||Not applicable||41,481||21-Jul-2007||12:38||Not applicable|
|Package_1_for_kb939006~31bf3856ad364e35~amd64~~22.214.171.124.mum||Not applicable||1,796||21-Jul-2007||12:26||Not applicable|
|Package_2_for_kb939006~31bf3856ad364e35~amd64~~126.96.36.199.mum||Not applicable||2,013||21-Jul-2007||12:26||Not applicable|
|Update.mum||Not applicable||1,925||21-Jul-2007||12:26||Not applicable|
|Wow64_microsoft.windows.winhttp_31bf3856ad364e35_5.1.6000.20645_none_89be5d45caf49754.manifest||Not applicable||34,828||21-Jul-2007||12:38||Not applicable|
How to enable the hotfixTo have us fix this problem for you, go to the “Fix it for me” section. If you’d rather fix this problem yourself, go to the “Let me fix it myself” section.
Fix it for meTo fix this problem automatically, click the
Fix this problemlink. Then click
File Downloaddialog box, and follow the steps in this wizard.
NoteThis wizard is temporarily in English only. However, the automatic fix also works for other language versions of Windows.
NoteIf you are not on the computer that has the problem, you can save the automatic fix to a flash drive or a CD so that you can run it on the computer that has the problem.
Now go to the "Did this fix the problem?" section.
Let me fix it myself
To use one of the hotfixes in this package, you must either create a registry key or modify a registry key.To do this, follow these steps.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
- Click Start, click Run, type regedit, and then click OK.
- Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Internet Settings\WinHttp
- On the Edit menu, point to
New, and then click DWORD Value.
- In the details pane, type
TcpAutoTuning, and then press ENTER.
- Right-click TcpAutoTuning, and then click
- In the Edit DWORD Value dialog box, click
Decimal under Base.
- In the Value data box, type
1, and then click OK.
- Exit Registry Editor.
- Restart the computer.
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.
Article ID: 939006 - Last Review: Oct 9, 2011 - Revision: 1