An update to prevent a Background Intelligent Transfer Service (BITS) crash on a Windows Vista-based computer

Support for Windows Vista without any service packs installed ended on April 13, 2010. To continue receiving security updates for Windows, make sure you're running Windows Vista with Service Pack 2 (SP2). For more information, refer to this Microsoft web page: Support is ending for some versions of Windows

Note If you are experiencing the symptoms that are described this article, see the following Microsoft Knowledge Base article to resolve these symptoms:
940520 The host process for Windows Services stops working after you download Microsoft updates on a computer that is running Windows Vista

The update that is described in this article prevents the symptoms that are described in this article. However, you cannot use this update to recover from symptoms that you are experiencing.


When updates are being downloaded from Windows Update on a Windows Vista-based computer, you may experience the following symptoms:
  • A dialog box appears that indicates that the host process for Windows Services has stopped working.
  • After you restart the computer, you receive the following error message in a Windows Update dialog box:
    Some Updates were not installed
    Failed: xx updates
    Error(s) Found:
    Code 800706BA
  • An event that resembles the following is logged in the Application log:


This problem occurs because the Background Intelligent Transfer Service (BITS) state files are corrupted. This problem stops the host process for Windows Services. This behavior prevents you from using BITS to transfer files.


Service pack information

To 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:
935791 How to obtain the latest Windows Vista service pack

Hotfixes and security updates that are included in SP2 for Windows Vista Service and for Windows Server 2008

For more information about the hotfixes and the security updates that are included in SP2 for Windows Vista and for Windows Server 2008, visit the following Microsoft TechNet Web site: -Note:Currently, the list of hotfixes and security updates is available only in English. An update is available to prevent a BITS crash on a Windows Vista-based computer.

Update information

An update is available to prevent a BITS crash on a Windows Vista-based computer.The following files are available for download from the Microsoft Download Center:

Windows Vista, 32-bit versions

Download Download the 939159 package now.

Windows Vista, 64-bit versions

Download Download the 939159 package now.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.


No prerequisites are required.

Restart requirement

You must restart the computer after you install this update.

Update replacement information

This update does not replace any other updates.

File information

The English version of this update 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 nameFile versionFile sizeDateTimePlatform
Update-bf.mumNot applicable1,74626-Jul-200718:43Not applicable
X86_95f9025e940221ff71b90bbcb12b5997_31bf3856ad364e35_6.0.6000.20647_none_41ed808d1593c68c.manifestNot applicable69926-Jul-200718:43Not applicable
X86_f1479b2110873990b2b9a281e8db3e25_31bf3856ad364e35_6.0.6000.16531_none_d1c8c5ebd7c90b15.manifestNot applicable69926-Jul-200718:43Not applicable
X86_microsoft-windows-bits-client_31bf3856ad364e35_6.0.6000.16531_none_218b14e6fc62ea9e.manifestNot applicable122,08126-Jul-200718:43Not applicable
X86_microsoft-windows-bits-client_31bf3856ad364e35_6.0.6000.20647_none_220fe38215833e63.manifestNot applicable122,08126-Jul-200718:43Not applicable
Qmgr.mofNot applicable2,30207-Jan-200705:31Not applicable
Qmgr.mofNot applicable2,30207-Jan-200705:31Not applicable
Windows Vista, 64-bit versions
File nameFile versionFile sizeDateTimePlatform
Amd64_268de7d1b3950bd78d4ec43e395c8e0d_31bf3856ad364e35_6.0.6000.20647_none_2fcba980449d77e2.manifestNot applicable70326-Jul-200718:43Not applicable
Amd64_cba080dad87678f379b404d4c9060151_31bf3856ad364e35_6.0.6000.16531_none_7643f907f44a851e.manifestNot applicable70326-Jul-200718:43Not applicable
Amd64_microsoft-windows-bits-client_31bf3856ad364e35_6.0.6000.16531_none_7da9b06ab4c05bd4.manifestNot applicable122,13726-Jul-200718:47Not applicable
Amd64_microsoft-windows-bits-client_31bf3856ad364e35_6.0.6000.20647_none_7e2e7f05cde0af99.manifestNot applicable122,13726-Jul-200718:47Not applicable
Update-bf.mumNot applicable1,75626-Jul-200718:43Not applicable
Qmgr.mofNot applicable2,30207-Jan-200705:39Not applicable
Qmgr.mofNot applicable2,30207-Jan-200705:32Not applicable


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Vista Service Pack 1.

Article ID: 939159 - Last Review: Oct 8, 2011 - Revision: 1