A computer stops responding during shutdown if BitLocker is enabled on the system drive on a computer that is running Windows 7 or Windows Server 2008 R2

Symptoms

Assume that you enable BitLocker for the system drive on a computer that is running Windows 7 or Windows Server 2008 R2. Then, you shut down the computer. You notice the computer intermittently stops responding during shutdown. Additionally, the operating system seems to have already shut down, and then the screen turns black. However, the computer does not turn off completely. Therefore, you may notice that the computer fan and other devices are still turned on.This problem does not occur if BitLocker is completely disabled, or if BitLocker is enabled on a data drive but disabled on the system drive.Note When this problem occurs, the functionality of the operating system is shut down. However, the computer hardware is not signaled to power off.

Resolution

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 the problem described in this article. 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:

http://support.microsoft.com/contactus/?ws=supportNote 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

No prerequisites are required.

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 global 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 7 and Windows Server 2008 R2 file information notes

Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

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:

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.

Windows 7, x86-based editions

File name	File version	File size	Date	Time	Platform
Fvevol.sys	6.1.7600.16429	194,488	26-Sep-2009	05:58	x86
Fvevol.sys	6.1.7600.20536	194,488	26-Sep-2009	06:14	x86

Windows 7 and Windows Server 2008 R2, x64-based editions

File name	File version	File size	Date	Time	Platform
Fvevol.sys	6.1.7600.16429	223,448	26-Sep-2009	06:20	x64
Fvevol.sys	6.1.7600.20536	223,448	26-Sep-2009	06:40	x64

Windows Server 2008 R2, Itanium-based editions

File name	File version	File size	Date	Time	Platform
Fvevol.sys	6.1.7600.16429	481,712	26-Sep-2009	07:23	IA-64
Fvevol.sys	6.1.7600.20536	481,712	26-Sep-2009	07:42	IA-64

Status

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

More Information

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

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