USB storage device cannot be recognized or mounted on a computer that is running Windows 7 or Windows Server 2008 R2

Applies to: Windows 7 EnterpriseWindows 7 Home BasicWindows 7 Home Premium More

Symptoms

Consider the following scenario:

You enable BitLocker Drive Encryption on a USB storage device that is connected to a Windows 7-based or a Windows Server 2008 R2-based computer.
When you run BitLocker To Go on the USB storage device, one of the following situations occurs and leads to an NTFS unexpected shutdown (also known as a dirty shutdown):
- You disconnect the USB device without ejecting it.
- The computer encounters a hard restart or shutdown, or encounters a power failure.

In this scenario, the USB storage device cannot be recognized or mounted on the computer. Additionally, when you run the Manage-bde.exe command on the removable storage device, the following error message is received:

ERROR: An error occurred (code 0x80070020):
The process cannot access the file because it is being used by another process.

Cause

This issue occurs because the virtualized boot block on the storage is created at a random location. Therefore, the virtualized boot block is overwritten by other files incorrectly.

Resolution

Update information

How to obtain this update

Microsoft Update

This update is available from the Windows Update website.

Microsoft Download Center

The following files are available for download from the Microsoft Download Center:

Operating system	Update
All supported x86-based versions of Windows 7	Download the update package now.
All supported x64-based versions of Windows 7	Download the update package now.
All supported x64-based versions of Windows Server 2008 R2	Download the update package now.
All supported IA-64-based versions of Windows Server 2008 R2	Download the update package now.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Prerequisites

To apply this hotfix, you must be running one of the following operating systems:

Windows 7
Windows 7 Service Pack 1 (SP1)
Windows Server 2008 R2
Windows Server 2008 R2 Service Pack 1 (SP1)

For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry information

To apply this hotfix, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global 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

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 0.21xxx	Windows 7 and Windows Server 2008 R2	RTM	LDR
6.1.760 1.18xxx	Windows 7 and Windows Server 2008 R2	SP1	GDR
6.1.760 1.22xxx	Windows 7 and Windows Server 2008 R2	SP1	LDR

GDR service branches contain only those fixes that are widely released to address widespread, critical 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 7 and for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical 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

File name	File version	File size	Date	Time	Platform
Dumpfve.sys	6.1.7600.16385	55,584	14-Jul-2009	01:17	x86
Fvevol.sys	6.1.7600.17221	195,816	24-Jan-2013	04:51	x86
Dumpfve.sys	6.1.7600.16385	55,584	14-Jul-2009	01:17	x86
Fvevol.sys	6.1.7600.21432	196,328	24-Jan-2013	04:53	x86
Dumpfve.sys	6.1.7600.16385	55,584	14-Jul-2009	01:17	x86
Fvevol.sys	6.1.7601.18062	196,328	24-Jan-2013	04:47	x86
Dumpfve.sys	6.1.7600.16385	55,584	14-Jul-2009	01:17	x86
Fvevol.sys	6.1.7601.22230	196,328	24-Jan-2013	04:28	x86

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

File name	File version	File size	Date	Time	Platform
Dumpfve.sys	6.1.7600.16385	55,128	14-Jul-2009	01:43	x64
Fvevol.sys	6.1.7600.17221	223,752	24-Jan-2013	05:41	x64
Dumpfve.sys	6.1.7600.16385	55,128	14-Jul-2009	01:43	x64
Fvevol.sys	6.1.7600.21432	223,752	24-Jan-2013	05:41	x64
Dumpfve.sys	6.1.7600.16385	55,128	14-Jul-2009	01:43	x64
Fvevol.sys	6.1.7601.18062	223,752	24-Jan-2013	06:01	x64
Dumpfve.sys	6.1.7600.16385	55,128	14-Jul-2009	01:43	x64
Fvevol.sys	6.1.7601.22230	223,768	24-Jan-2013	05:28	x64

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

File name	File version	File size	Date	Time	Platform
Dumpfve.sys	6.1.7600.16385	82,248	14-Jul-2009	01:52	IA-64
Fvevol.sys	6.1.7600.17221	483,552	24-Jan-2013	04:52	IA-64
Dumpfve.sys	6.1.7600.16385	82,248	14-Jul-2009	01:52	IA-64
Fvevol.sys	6.1.7600.21432	484,064	24-Jan-2013	04:50	IA-64
Dumpfve.sys	6.1.7600.16385	82,248	14-Jul-2009	01:52	IA-64
Fvevol.sys	6.1.7601.18062	484,080	24-Jan-2013	04:41	IA-64
Dumpfve.sys	6.1.7600.16385	82,248	14-Jul-2009	01:52	IA-64
Fvevol.sys	6.1.7601.22230	484,064	24-Jan-2013	04:32	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

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

File name	X86_0e6ef9db05314fefc2dbcdfe668474b1_31bf3856ad364e35_6.1.7601.22230_none_b1a4970369362aa3.manifest
File version	Not applicable
File size	714
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable
File name	X86_2a6b39c5403a13d59b4c33d7de1cce8d_31bf3856ad364e35_6.1.7600.17221_none_75e1799c0df7b7f0.manifest
File version	Not applicable
File size	714
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable
File name	X86_640ee2fe98bc32065df3331a6b5e87e1_31bf3856ad364e35_6.1.7601.18062_none_61369a388def277c.manifest
File version	Not applicable
File size	714
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable
File name	X86_66d258cacdab0bf86057f077ddb0ed8a_31bf3856ad364e35_6.1.7600.21432_none_a94ff2d3d4f02282.manifest
File version	Not applicable
File size	714
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable
File name	X86_microsoft-windows-s..tartup-filterdriver_31bf3856ad364e35_6.1.7600.17221_none_2e97935141145286.manifest
File version	Not applicable
File size	35,383
Date (UTC)	24-Jan-2013
Time (UTC)	22:52
Platform	Not applicable
File name	X86_microsoft-windows-s..tartup-filterdriver_31bf3856ad364e35_6.1.7600.21432_none_2f1762605a3924bf.manifest
File version	Not applicable
File size	35,383
Date (UTC)	24-Jan-2013
Time (UTC)	22:52
Platform	Not applicable
File name	X86_microsoft-windows-s..tartup-filterdriver_31bf3856ad364e35_6.1.7601.18062_none_3053b0f13e5a478d.manifest
File version	Not applicable
File size	35,383
Date (UTC)	24-Jan-2013
Time (UTC)	22:52
Platform	Not applicable
File name	X86_microsoft-windows-s..tartup-filterdriver_31bf3856ad364e35_6.1.7601.22230_none_30fbbed257615dfd.manifest
File version	Not applicable
File size	35,383
Date (UTC)	24-Jan-2013
Time (UTC)	22:52
Platform	Not applicable

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

File name	Amd64_08ae60542d6498c835fcb14b98629223_31bf3856ad364e35_6.1.7600.21432_none_bd57445a838be289.manifest
File version	Not applicable
File size	718
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable
File name	Amd64_1b1a122ae4155daceb8549a97531a576_31bf3856ad364e35_6.1.7601.18062_none_87494051e6d620d0.manifest
File version	Not applicable
File size	718
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable
File name	Amd64_b0eb20980b94ea6ded98b03dfbc9e855_31bf3856ad364e35_6.1.7600.17221_none_4dfa9242cf8f803b.manifest
File version	Not applicable
File size	718
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable
File name	Amd64_cdec8e4c241d347be214eea8a628418b_31bf3856ad364e35_6.1.7601.22230_none_c288eaaba7849758.manifest
File version	Not applicable
File size	718
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable
File name	Amd64_microsoft-windows-s..tartup-filterdriver_31bf3856ad364e35_6.1.7600.17221_none_8ab62ed4f971c3bc.manifest
File version	Not applicable
File size	35,387
Date (UTC)	24-Jan-2013
Time (UTC)	22:55
Platform	Not applicable
File name	Amd64_microsoft-windows-s..tartup-filterdriver_31bf3856ad364e35_6.1.7600.21432_none_8b35fde4129695f5.manifest
File version	Not applicable
File size	35,387
Date (UTC)	24-Jan-2013
Time (UTC)	22:55
Platform	Not applicable
File name	Amd64_microsoft-windows-s..tartup-filterdriver_31bf3856ad364e35_6.1.7601.18062_none_8c724c74f6b7b8c3.manifest
File version	Not applicable
File size	35,387
Date (UTC)	24-Jan-2013
Time (UTC)	22:55
Platform	Not applicable
File name	Amd64_microsoft-windows-s..tartup-filterdriver_31bf3856ad364e35_6.1.7601.22230_none_8d1a5a560fbecf33.manifest
File version	Not applicable
File size	35,387
Date (UTC)	24-Jan-2013
Time (UTC)	22:55
Platform	Not applicable

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

File name	Ia64_368d1d57e928529bd03338f2c26c5558_31bf3856ad364e35_6.1.7601.18062_none_1428a98c48a5ba4d.manifest
File version	Not applicable
File size	716
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable
File name	Ia64_a945d780d0c1bd63ab09aa1bfa0b0251_31bf3856ad364e35_6.1.7601.22230_none_7ef15710eafb9bb6.manifest
File version	Not applicable
File size	716
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable
File name	Ia64_ca33786ff57340bdeede57f0732ffb65_31bf3856ad364e35_6.1.7600.17221_none_c15f360034003294.manifest
File version	Not applicable
File size	716
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable
File name	Ia64_f582916cd4648777de25d7788d71ad45_31bf3856ad364e35_6.1.7600.21432_none_1993a278fe505c7c.manifest
File version	Not applicable
File size	716
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable
File name	Ia64_microsoft-windows-s..tartup-filterdriver_31bf3856ad364e35_6.1.7600.17221_none_2e99374741125b82.manifest
File version	Not applicable
File size	35,385
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable
File name	Ia64_microsoft-windows-s..tartup-filterdriver_31bf3856ad364e35_6.1.7600.21432_none_2f1906565a372dbb.manifest
File version	Not applicable
File size	35,385
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable
File name	Ia64_microsoft-windows-s..tartup-filterdriver_31bf3856ad364e35_6.1.7601.18062_none_305554e73e585089.manifest
File version	Not applicable
File size	35,385
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable
File name	Ia64_microsoft-windows-s..tartup-filterdriver_31bf3856ad364e35_6.1.7601.22230_none_30fd62c8575f66f9.manifest
File version	Not applicable
File size	35,385
Date (UTC)	24-Jan-2013
Time (UTC)	22:49
Platform	Not applicable

Last Updated: Apr 9, 2013