Microsoft KB Archive/933207

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Article ID: 933207

Article Last Modified on 9/14/2007


  • Windows Vista Home Basic 64-bit Edition
  • Windows Vista Home Premium 64-bit Edition
  • Windows Vista Business 64-bit Edition
  • Windows Vista Enterprise 64-bit Edition
  • Windows Vista Ultimate 64-bit Edition
  • Windows Vista Starter
  • Windows Vista Home Basic
  • Windows Vista Home Premium
  • Windows Vista Business
  • Windows Vista Enterprise
  • Windows Vista Ultimate


After you burn a DVD-R Dual Layer (DL) disc or a DVD+R DL disc in Windows Vista, you may be unable to read the disc. When you try to read the disc, you may receive an error message that resembles the following:

Drive_letter:\ is not accessible.
The disk structure is corrupted and unreadable

When this problem occurs, the disc properties may indicate that the disc contains no files and that the size of the disc is zero.

This problem is known to occur when you use specific models of DVD drives that were manufactured in about 2004 or earlier.


Hotfix information

A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may 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 immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.


No prerequisites are required.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

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, x86-based versions
File name File version File size Date Time Platform
Udfs.sys 6.0.6000.20661 225,792 15-Aug-2007 00:58 x86
Update.mum Not Applicable 1,999 15-Aug-2007 15:37 Not Applicable
X86_7c3b956690431d40a8c3a98cc1c29762_31bf3856ad364e35_6.0.6000.20661_none_18d308d6eed62955.manifest Not Applicable 692 15-Aug-2007 15:37 Not Applicable
X86_microsoft-windows-udfs_31bf3856ad364e35_6.0.6000.20661_none_a4dd1544390a8393.manifest Not Applicable 6,020 15-Aug-2007 15:37 Not Applicable
Windows Vista, 64-bit versions
File name File version File size Date Time Platform
Amd64_8bedac795dba45dd70fc4d1a35735a2d_31bf3856ad364e35_6.0.6000.20661_none_1db2b116430086c0.manifest Not Applicable 696 15-Aug-2007 15:37 Not Applicable
Amd64_microsoft-windows-udfs_31bf3856ad364e35_6.0.6000.20661_none_00fbb0c7f167f4c9.manifest Not Applicable 6,275 15-Aug-2007 15:43 Not Applicable
Udfs.sys 6.0.6000.20661 299,008 15-Aug-2007 01:06 x64
Update.mum Not Applicable 1,999 15-Aug-2007 15:37 Not Applicable


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


This hotfix cannot resolve the problem for all DVD drives. If this hotfix does not resolve the problem for the drive that you use, contact the manufacturer of your hardware for more information about how to resolve the problem. For information about how to contact the manufacturer of your hardware, click the appropriate article number in the following list to view the article in the Microsoft Knowledge Base:

65416 Hardware and software vendor contact information, A-K

60781 Hardware and software vendor contact information, L-P

60782 Hardware and software vendor contact information, Q-Z

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

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

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.

Keywords: kbtshoot kbbug kbfix kbqfe kbexpertisebeginner kbhotfixserver kbwinvistapostrtmfix KB933207