An application that is running on a Windows Server 2008-based or Windows Vista SP1-based system may corrupt files on a local file share when these files are scanned

An application that is running on a Windows Server 2008-based or Windows Vista SP1-based system may corrupt files on a local file share when these files are scanned

Article ID : 956550
Last Review : September 9, 2008
Revision : 1.0
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SYMPTOMS

Consider the following scenario:

• On a Windows Server 2008-based or Windows Vista Service Pack 1 (SP1)-based computer, an application writes to a file on a local file share.
• This file is scanned by using memory-mapped files. This scanning process typically occurs when certain antivirus software is installed on the computer.

In this scenario, additional character spaces may be added to sections of the file. Therefore, the file becomes corrupted.

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RESOLUTION

Hotfix information

A 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:

http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)

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.

Prerequisites

To apply this hotfix, you must have Windows Server 2008 or Windows Vista Service Pack 1 (SP1) installed.

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

935791 (/Feedback.aspx?kbNumber=935791/) How to obtain the latest Windows Vista service pack

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The 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 and Windows Server 2008 file information notes

The MANIFEST files (.manifest) and MUM files (.mum) that are installed for each environment are listed separately. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows Server 2008 and of Windows Vista
File name File version File size Date Time Platform
Rdbss.sys 6.0.6001.22246 224,768 19-Aug-2008 00:48 x86
For all supported x64-based versions of Windows Server 2008 and of Windows Vista
File name File version File size Date Time Platform
Rdbss.sys 6.0.6001.22246 288,256 19-Aug-2008 02:01 x64
For all supported IA-64-based versions of Windows Server 2008
File name File version File size Date Time Platform
Rdbss.sys 6.0.6001.22246 676,864 19-Aug-2008 01:41 IA-64

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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the Applies to section.

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MORE INFORMATION

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Additional file information for Windows Server 2008 and for Windows Vista

Additional files for all supported x86-based versions of Windows Server 2008 and of Windows Vista

File name Package_1_for_kb956550~31bf3856ad364e35~x86~~6.0.1.0.mum
File version Not Applicable
File size 1,773
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_2_for_kb956550~31bf3856ad364e35~x86~~6.0.1.0.mum
File version Not Applicable
File size 1,940
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_3_for_kb956550~31bf3856ad364e35~x86~~6.0.1.0.mum
File version Not Applicable
File size 1,778
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_4_for_kb956550~31bf3856ad364e35~x86~~6.0.1.0.mum
File version Not Applicable
File size 1,778
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_client_1~31bf3856ad364e35~x86~~6.0.1.0.mum
File version Not Applicable
File size 1,367
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_client~31bf3856ad364e35~x86~~6.0.1.0.mum
File version Not Applicable
File size 1,431
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File version Not Applicable
File size 1,421
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_sc~31bf3856ad364e35~x86~~6.0.1.0.mum
File version Not Applicable
File size 1,423
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_server_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File version Not Applicable
File size 1,425
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_server~31bf3856ad364e35~x86~~6.0.1.0.mum
File version Not Applicable
File size 1,431
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_winpesrv_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File version Not Applicable
File size 1,422
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_winpesrv~31bf3856ad364e35~x86~~6.0.1.0.mum
File version Not Applicable
File size 1,429
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name X86_958e61ccdca57c71052655883971d861_31bf3856ad364e35_6.0.6001.22246_none_0a00121f7d7a57b5.manifest
File version Not Applicable
File size 693
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name X86_microsoft-windows-rdbss_31bf3856ad364e35_6.0.6001.22246_none_5a3938897aa21453.manifest
File version Not Applicable
File size 6,856
Date (UTC) 19-Aug-2008
Time (UTC) 04:07
Platform Not Applicable

Additional files for all supported x64-based versions of Windows Server 2008 and of Windows Vista

File name Amd64_7a32e938e86556dedb45cbfa051d98ca_31bf3856ad364e35_6.0.6001.22246_none_04144020821a2f00.manifest
File version Not Applicable
File size 697
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Amd64_microsoft-windows-rdbss_31bf3856ad364e35_6.0.6001.22246_none_b657d40d32ff8589.manifest
File version Not Applicable
File size 7,113
Date (UTC) 19-Aug-2008
Time (UTC) 05:33
Platform Not Applicable
File name Package_1_for_kb956550~31bf3856ad364e35~amd64~~6.0.1.0.mum
File version Not Applicable
File size 1,783
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_2_for_kb956550~31bf3856ad364e35~amd64~~6.0.1.0.mum
File version Not Applicable
File size 1,952
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_3_for_kb956550~31bf3856ad364e35~amd64~~6.0.1.0.mum
File version Not Applicable
File size 1,788
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_4_for_kb956550~31bf3856ad364e35~amd64~~6.0.1.0.mum
File version Not Applicable
File size 1,788
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mum
File version Not Applicable
File size 1,375
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_client~31bf3856ad364e35~amd64~~6.0.1.0.mum
File version Not Applicable
File size 1,439
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File version Not Applicable
File size 1,429
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_sc~31bf3856ad364e35~amd64~~6.0.1.0.mum
File version Not Applicable
File size 1,431
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File version Not Applicable
File size 1,433
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_server~31bf3856ad364e35~amd64~~6.0.1.0.mum
File version Not Applicable
File size 1,439
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_winpesrv_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File version Not Applicable
File size 1,430
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_winpesrv~31bf3856ad364e35~amd64~~6.0.1.0.mum
File version Not Applicable
File size 1,437
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable

Additional files for all supported IA-64-based versions of Windows Server 2008

File name Ia64_da6c03608d5a8f3ce9ab0970cd6b8e0c_31bf3856ad364e35_6.0.6001.22246_none_b4621975baceb5cf.manifest
File version Not Applicable
File size 695
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Ia64_microsoft-windows-rdbss_31bf3856ad364e35_6.0.6001.22246_none_5a3adc7f7aa01d4f.manifest
File version Not Applicable
File size 7,107
Date (UTC) 19-Aug-2008
Time (UTC) 05:38
Platform Not Applicable
File name Package_1_for_kb956550~31bf3856ad364e35~ia64~~6.0.1.0.mum
File version Not Applicable
File size 1,778
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_2_for_kb956550~31bf3856ad364e35~ia64~~6.0.1.0.mum
File version Not Applicable
File size 1,783
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_3_for_kb956550~31bf3856ad364e35~ia64~~6.0.1.0.mum
File version Not Applicable
File size 1,783
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File version Not Applicable
File size 1,425
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_sc~31bf3856ad364e35~ia64~~6.0.1.0.mum
File version Not Applicable
File size 1,426
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File version Not Applicable
File size 1,429
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_server~31bf3856ad364e35~ia64~~6.0.1.0.mum
File version Not Applicable
File size 1,434
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_winpesrv_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File version Not Applicable
File size 1,426
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable
File name Package_for_kb956550_winpesrv~31bf3856ad364e35~ia64~~6.0.1.0.mum
File version Not Applicable
File size 1,433
Date (UTC) 19-Aug-2008
Time (UTC) 12:40
Platform Not Applicable

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MORE INFORMATION

You may encounter this issue when you run an application that writes configuration files to a local file share on which Forefront Client Security is installed. For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 (/Feedback.aspx?kbNumber=824684/) Description of the standard terminology that is used to describe Microsoft software updates

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APPLIES TO
• Windows Vista Service Pack 1, when used with:
    Windows Vista Business
    Windows Vista Enterprise
    Windows Vista Home Basic
    Windows Vista Home Premium
    Windows Vista Ultimate
    Windows Vista Business 64-bit Edition
    Windows Vista Enterprise 64-bit Edition
    Windows Vista Home Basic 64-bit Edition
    Windows Vista Home Premium 64-bit Edition
    Windows Vista Ultimate 64-bit Edition
• Windows Server 2008 Datacenter without Hyper-V
• Windows Server 2008 Enterprise without Hyper-V
• Windows Server 2008 for Itanium-Based Systems
• Windows Server 2008 Standard without Hyper-V
• Windows Server 2008 Datacenter
• Windows Server 2008 Enterprise
• Windows Server 2008 Standard

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Keywords: 
kbautohotfix kbexpertiseinter kbfix kbbug kbqfe kbhotfixserver KB956550

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Microsoft Knowledge Base Article

This article contents is Microsoft Copyrighted material.
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