Consider the following scenario:

•	You format an optical disc by using the Live File System component on a Windows Vista-based computer.
•	You eject the disc soon after the formatting operation appears to be complete. Or, you eject the disc soon after you write a file to the disc, after the formatting operation is complete.
•	You reinsert the disc.

In this scenario, the disc appears to be blank. Any files that were written to the disc after the formatting operation are lost. Additionally, you cannot write any files to the disc. This problem occurs only when you use the Live File System component to format the disk, and then you eject the disk soon after a write operation has occurred.

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This problem occurs for any one of the following reasons:

•	The brand of the disc may be incompatible with the burner. Try a different brand of media.
•	The disc may be defective. Try another disc.
•	The burner may have malfunctioned. For troubleshooting information, see the documentation that was included with the burner.
•	The burner or the disc may not support the speed that you used to burn the disk. Try using a slower speed.

Also consider the possibility that Windows Vista does not successfully run the close-session command when the disc is ejected. If the session is not closed correctly, the data that is written to the disc cannot be read. Therefore, the disc appears to be blank. Because this problem is timing-specific, this problem occurs only occasionally.

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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:

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Hotfix information

The following hotfix resolves only the specific problem in which Windows Vista does not successfully run the close-session command when the disc is ejected. 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:

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	6.0.6000.20528	225,280	02-Feb-2007	02:04	x86
Update.mum	Not Applicable	1,984	02-Feb-2007	23:21	Not Applicable
X86_microsoft-windows-udfs.d_31bf3856ad364e35_6.0.6000.20528_none_7fc9b855de5a62e7.manifest	Not Applicable	685	02-Feb-2007	23:21	Not Applicable
X86_microsoft-windows-udfs_31bf3856ad364e35_6.0.6000.20528_none_a50f551438e3c809.manifest	Not Applicable	6,020	02-Feb-2007	23:22	Not Applicable

Windows Vista, 64-bit versions

File name	File version	File size	Date	Time	Platform
Amd64_microsoft-windows-udfs.d_31bf3856ad364e35_6.0.6000.20528_none_dbe853d996b7d41d.manifest	Not Applicable	689	02-Feb-2007	23:21	Not Applicable
Amd64_microsoft-windows-udfs_31bf3856ad364e35_6.0.6000.20528_none_012df097f141393f.manifest	Not Applicable	6,275	02-Feb-2007	23:27	Not Applicable
Udfs.sys	6.0.6000.20528	299,008	02-Feb-2007	02:20	x64
Update.mum	Not Applicable	1,984	02-Feb-2007	23:21	Not Applicable

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To work around this problem, wait at least three minutes after any disc operation is performed before you eject the disc.

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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.

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For more information about how to burn a CD or a DVD on a Windows Vista-based computer, visit the following Microsoft Web site: For more information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base: For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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