When you try to restart a Windows Server 2003 R2-based computer that has both VSS and the FSRM quota enabled, the computer stops responding

Consider the following scenario:

• You are running a Windows Server 2003 R2-based computer or a Windows Server 2003 R2 Service Pack 2-based computer.
• Many storage volumes are mounted on this computer.
• You enable Volume Shadow Copy Service (VSS) and the File Server Resource Manager (FSRM) quota.

When you try to restart the computer in this scenario, the system startup process stops responding (hangs) when the progress bar reaches 25 percent. Therefore, you have to turn off the computer. However, after you do this, you may experience one of the following symptoms:

• Although the computer can be successfully restarted, the VSS data and the snapshot information are missing.
• The computer continues to stop responding during startup until you use safe mode to unmount some volumes.

This problem occurs because of a deadlock among the filter manager, the mount manager, VSS, and FSRM.

Hotfix information

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

Prerequisites

To apply this hotfix, you must have Windows Server 2003 R2 or Windows Server 2003 R2 Service Pack 2 (SP2) installed.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

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 Server 2003 R2, x86-based versionsWindows Server 2003 R2 with Service Pack 2, x86-based versionsWindows Server 2003 R2, x64-based versionsWindows Server 2003 R2 with Service Pack 2, x64-based versions

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: