Microsoft KB Archive/929755

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Article ID: 929755

Article Last Modified on 8/29/2007


  • Microsoft Windows XP Home Edition
  • Microsoft Windows XP Professional


When you start a computer that is running Microsoft Windows XP Service Pack 2 (SP2), the Chkdsk tool automatically starts scanning a disk. Also, an error message that resembles the following is logged in the System event log:

Event Type: Error
Event Source: Ntfs
Event Category: Disk
Event ID: 55
Date: date
Time: time
User: N/A
Computer: computer name
Description: The file system structure on the disk is corrupt and unusable. Please run the chkdsk utility on the volume disk letter.

After the Chkdsk tool finishes scanning the disk, you cannot access the files on the disk.


This problem occurs because of a corruption in the master file table (MFT) on the disk.


A supported hotfix is now 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 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:


There are no prerequisites for installing this hotfix.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

Registry information

To use one of the hotfixes in this package, you do not have to make any changes to the registry.

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 XP, x86-based versions
File name File version File size Date Time Platform
Ntfs.sys 5.1.2600.3051 574,976 19-Dec-2006 16:43 x86


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


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

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbexpertisebeginner kbfix kbhotfixserver kbqfe kbpubtypekc KB929755