You are repeatedly prompted to insert a new disk when you use the Backup and Restore tool in Windows 7 or the Windows Server Backup tool in Windows Server 2008 R2 to back up your files or to create a system image on a recordable Blu-ray disc (BD-R)

Consider the following scenario:

• You have a computer that is running Windows 7 or Windows Server 2008 R2.
• You back up your files or you create a system image on a recordable Blu-ray disc (BD-R) by using one of the following backup tools:
  • The Backup and Restore tool in Windows 7.
  • The Windows Server Backup tool in Windows Server 2008 R2.
• The backup tool prompts you to insert a new disc.
• You follow the instruction to insert a new disc.

In this scenario, the backup tool repeatedly prompts you to insert a new disc and writes the same data to each disk that you insert. Therefore, the backup operation is never completed.

This problem occurs because of an error in the Udfs.sys system driver.

Update information

How to obtain this update

A supported update is available from Microsoft.

If the update 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 update.
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 update. 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: Note The "Hotfix download available" form displays the languages for which the update is available. If you do not see your language, it is because a update is not available for that language.

Prerequisites

To apply this update, your computer must be running Windows 7 or Windows Server 2008 R2.

Registry information

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

Restart requirement

You must restart the computer after you apply this update.

Update replacement information

This update does not replace a previously released update.

File information

The English (United States) version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows 7 and Windows Server 2008 R2 file information notes

• The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:
  Collapse this tableExpand this table

  Version	Product	Milestone	Service branch
  6.1.760 0.16xxx	Windows 7 and Windows Server 2008 R2	RTM	GDR
  6.1.760 0.20xxx	Windows 7 and Windows Server 2008 R2	RTM	LDR

• GDR service branches contain only those fixes that are widely released to address widespread, extremely important issues. LDR service branches contain hotfixes in addition to widely released fixes.
• The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2 and for Windows 7" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintaining the state of the updated component. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 7

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

For all supported IA-64-based versions of Windows Server 2008 R2

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

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

Additional file information

Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

Additional files for all supported IA-64-based versions of Windows Server 2008 R2

For more information about how to use the Backup and Restore tool in Windows 7, visit the following Microsoft Web site:For more information about how to use the Windows Server Backup tool in Windows Server 2008 R2, visit the following Microsoft Web site: