Article ID: 944292 - View products that this article applies to.
Consider the following scenario:
Note The external USB optical disc drive can be displayed correctly in Device Manager after you restart the computer.
Error 38 (CM_PROB_DRIVER_FAILED_PRIOR_UNLOAD)
Service pack informationTo 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:
(http://support.microsoft.com/kb/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 2008For 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: -
http://technet.microsoft.com/en-us/library/dd335033.aspxNote: Currently, the list of hotfixes and security updates is available only in English.
Hotfix informationA 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:
PrerequisitesThere are no prerequisites for installing this hotfix.
Restart requirementYou must restart the computer after you apply this hotfix.
Hotfix replacement informationThis hotfix does not replace a previously released hotfix.
File informationThe 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
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Windows Vista, 64-bit versions
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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For information about the FSCTL_DISMOUNT_VOLUME control code, visit the following Microsoft Web site:
http://msdn2.microsoft.com/en-us/library/aa364562.aspxFor information about the FSCTL_IS_VOLUME_MOUNTED control code, visit the following Microsoft Web site:
http://msdn2.microsoft.com/en-us/library/aa364574.aspxThis hotfix cannot resolve the problem for all optical disc drives. If this hotfix does not resolve the problem for the optical disc drive that you use, contact the manufacturer of your hardware for more information about how to resolve the problem.
For information about your hardware manufacturer, visit the following Web site:
http://support.microsoft.com/gp/vendors/en-usFor more information about media issues on a Windows Vista-based computer, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/930917/ )An optical disc appears to be blank after you format the disc by using the Live File System component on a Windows Vista-based computer
Article ID: 944292 - Last Review: November 14, 2007 - Revision: 1.4
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