This article describes an issue that occurs when you connect Windows Portable Devices (WPD) devices to a computer that's running Windows 8.1, Windows RT 8.1, or Windows Server 2012 R2. A hotfix is available to fix this issue. The hotfix has a prerequisite.

Symptoms

Assume that you access the WPD devices through a custom User-Mode Driver Framework (UMDF) driver. When you use the custom UMDF driver to call the CreateFile() API, the driver crashes.

Cause

This issue occurs because of a design change to the Wpdmtpdr.dll driver.

Hotfix information

Important If you install a language pack after you install this hotfix, you must reinstall this hotfix. Therefore, we recommend that you install any language packs that you need before you install this hotfix. For more information, see Add language packs to Windows.

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that's described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there's a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section doesn't appear, submit a request to Microsoft Customer Service and Support to get 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 don't 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 website:

http://support.microsoft.com/contactus/?ws=supportNote The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you don't see your language, it's because a hotfix isn't available for that language.

Prerequisites

To apply this hotfix, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows 8.1 or Windows Server 2012 R2.

Registry information

To use the hotfix in this package, you don't have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix doesn't replace a previously released hotfix.

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 8.1 and Windows Server 2012 R2 file information and notes

Important Windows 8.1 hotfixes and Windows Server 2012 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's listed under "Windows 8.1/Windows Server 2012 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

    6.3.960 0.16 xxx

    Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2

    RTM

    GDR

    6.3.960 0.17xxx

    Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2

    RTM

    GDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very important to maintain the state of the updated components. The security catalog files, for which the attributes aren't listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 8.1

File name

File version

File size

Date

Time

Platform

Wpdmtp.dll

6.3.9600.17415

189,952

29-Oct-2014

01:24

x86

Wpdmtpbt.dll

6.3.9600.17415

72,192

29-Oct-2014

01:24

x86

Wpdmtpdr.dll

6.3.9600.17997

732,672

27-Jul-2015

14:11

x86

Wpdmtpip.dll

6.3.9600.17415

72,704

29-Oct-2014

01:16

x86

Wpdmtpus.dll

6.3.9600.17415

110,592

29-Oct-2014

01:24

x86

For all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Wpdmtp.dll

6.3.9600.17415

224,768

29-Oct-2014

01:57

x64

Wpdmtpbt.dll

6.3.9600.17415

84,992

29-Oct-2014

01:57

x64

Wpdmtpdr.dll

6.3.9600.17997

970,240

27-Jul-2015

14:12

x64

Wpdmtpip.dll

6.3.9600.17415

88,064

29-Oct-2014

01:46

x64

Wpdmtpus.dll

6.3.9600.17415

138,240

29-Oct-2014

01:57

x64

For all supported Windows RT 8.1

File name

File version

File size

Date

Time

Platform

Wpdmtp.dll

6.3.9600.16384

163,840

22-Aug-2013

02:35

Not applicable

Wpdmtpbt.dll

6.3.9600.16384

66,560

22-Aug-2013

02:35

Not applicable

Wpdmtpdr.dll

6.3.9600.17997

699,904

27-Jul-2015

14:07

Not applicable

Wpdmtpip.dll

6.3.9600.16384

67,584

22-Aug-2013

02:28

Not applicable

Wpdmtpus.dll

6.3.9600.16384

100,352

22-Aug-2013

02:35

Not applicable

Additional file information

Additional file information for Windows 8.1 and for Windows Server 2012 R2

Additional files for all supported x86-based versions of Windows 8.1

File property

Value

File name

X86_wpdmtp.inf_31bf3856ad364e35_6.3.9600.17997_none_b4322fb8a24fa300.manifest

File version

Not applicable

File size

4,649

Date (UTC)

27-Jul-2015

Time (UTC)

23:34

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2

File property

Value

File name

Amd64_wpdmtp.inf_31bf3856ad364e35_6.3.9600.17997_none_1050cb3c5aad1436.manifest

File version

Not applicable

File size

4,653

Date (UTC)

27-Jul-2015

Time (UTC)

23:37

Platform

Not applicable

Additional files for all supported Windows RT 8.1

File property

Value

File name

Arm_wpdmtp.inf_31bf3856ad364e35_6.3.9600.17997_none_b434a210a24cc1c6.manifest

File version

Not applicable

File size

4,649

Date (UTC)

27-Jul-2015

Time (UTC)

23:30

Platform

Not applicable

Status

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

References

See the terminology that Microsoft uses to describe software updates.

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