Not sure if this is the right fix? We've added this issue to our memory dump diagnostic which can confirm.

Symptoms

Consider the following scenario:

  • You have a computer that is running Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, or Windows Server 2008 R2.

  • You have a device that uses the multifunction bus driver (mf.sys).


In this scenario, you receive a Stop error 0x9F in the mf.sys driver.

Resolution

To resolve this issue in Windows 8 and Windows Server 2012, install update 2934016, or install the hotfix that is described in this article.
To resolve this issue in Windows 8.1, Windows Server 2012 R2, Windows 7, and Windows Server 2008 R2, install the hotfix that is described in this article.

Update information for Windows 8 and Windows Server 2012

For more information about how to obtain update 2934016, click the following article number to view the article in the Microsoft Knowledge Base:

2934016 Windows RT, Windows 8, and Windows Server 2012 update rollup: April 2014

Hotfix information

A supported hotfix is available from Microsoft Support. 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, go to 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 do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must haveWindows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Service Pack 1 for Windows 7 or Windows Server 2008 R2 installed.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.

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 RT 8.1, Windows 8.1 and Windows Server 2012 R2 file information and notes

Important Windows 8.1 and Windows Server 2012 R2 hotfixes are included in the same packages. However, only "Windows 8.1" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8.1" 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 RT8.1, Windows 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 extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For Windows RT 8.1

File name

File version

File size

Date

Time

Platform

Mf.sys

6.3.9600.16521

31,232

29-Jan-2014

05:31

Not applicable

For all supported x86-based versions of Windows 8.1

File name

File version

File size

Date

Time

Platform

Mf.sys

6.3.9600.16521

30,208

29-Jan-2014

06:25

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

Mf.sys

6.3.9600.16521

36,864

29-Jan-2014

00:18

x64


Windows RT, Windows 8, and Windows Server 2012 file information notes

Important Windows 8 and Windows Server 2012 hotfixes are included in the same packages. However, only "Windows 8" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8" 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, SR_Level (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

    6.2.920 0.16 xxx

    Windows RT, Windows 8, and Windows Server 2012

    RTM

    GDR

    6.2.920 0.20xxx

    Windows RT, Windows 8, and Windows Server 2012

    RTM

    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┬áin the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very 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 Windows RT

File name

File version

File size

Date

Time

Platform

Mf.sys

6.2.9200.16817

129,536

08-Feb-2014

03:41

Not applicable

For all supported x86-based versions of Windows 8

File name

File version

File size

Date

Time

Platform

Mf.sys

6.2.9200.16817

127,488

08-Feb-2014

04:10

x86

Mf.sys

6.2.9200.20937

127,488

08-Feb-2014

04:07

x86

For all supported x64-based versions of Windows 8 and Windows Server 2012

File name

File version

File size

Date

Time

Platform

Mf.sys

6.2.9200.16817

158,720

08-Feb-2014

04:35

x64

Mf.sys

6.2.9200.20937

158,720

08-Feb-2014

04:24

x64

Windows 7 and Windows Server 2008 R2 file information and 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, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

    Version

    Product

    SR_Level

    Service branch

    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, 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" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. 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

Mf.sys

6.1.7601.18332

114,176

04-Dec-2013

00:58

x86

Mf.sys

6.1.7601.22530

114,176

04-Dec-2013

01:00

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

Mf.sys

6.1.7601.18332

142,848

04-Dec-2013

01:14

x64

Mf.sys

6.1.7601.22530

142,848

04-Dec-2013

01:18

x64

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

File name

File version

File size

Date

Time

Platform

Mf.sys

6.1.7601.18332

215,552

04-Dec-2013

00:39

IA-64

Mf.sys

6.1.7601.22530

215,552

04-Dec-2013

00:43

IA-64


Status

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

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

Additional files for Windows RT 8.1

File property

Value

File name

Arm_mf.inf_31bf3856ad364e35_6.3.9600.16521_none_541892c5a899b65d.manifest

File version

Not applicable

File size

2,074

Date (UTC)

29-Jan-2014

Time (UTC)

07:01

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,588

Date (UTC)

29-Jan-2014

Time (UTC)

16:54

Platform

Not applicable

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

File property

Value

File name

Update.mum

File version

Not applicable

File size

1,588

Date (UTC)

29-Jan-2014

Time (UTC)

16:52

Platform

Not applicable

File name

X86_mf.inf_31bf3856ad364e35_6.3.9600.16521_none_5416206da89c9797.manifest

File version

Not applicable

File size

2,074

Date (UTC)

29-Jan-2014

Time (UTC)

08:16

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_mf.inf_31bf3856ad364e35_6.3.9600.16521_none_b034bbf160fa08cd.manifest

File version

Not applicable

File size

2,078

Date (UTC)

29-Jan-2014

Time (UTC)

10:28

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,596

Date (UTC)

29-Jan-2014

Time (UTC)

16:50

Platform

Not applicable



Additional file information for Windows RT, Windows 8, and Windows Server 2012

Additional files for Windows RT

File property

Value

File name

Arm_mf.inf_31bf3856ad364e35_6.2.9200.16817_none_bc34b1795e59596e.manifest

File version

Not applicable

File size

2,074

Date (UTC)

08-Feb-2014

Time (UTC)

07:41

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,589

Date (UTC)

10-Feb-2014

Time (UTC)

17:07

Platform

Not applicable

Additional files for all supported x86-based versions of Windows 8

File property

Value

File name

Update.mum

File version

Not applicable

File size

1,785

Date (UTC)

10-Feb-2014

Time (UTC)

17:09

Platform

Not applicable

File name

X86_mf.inf_31bf3856ad364e35_6.2.9200.16817_none_bc323f215e5c3aa8.manifest

File version

Not applicable

File size

2,074

Date (UTC)

08-Feb-2014

Time (UTC)

05:56

Platform

Not applicable

File name

X86_mf.inf_31bf3856ad364e35_6.2.9200.20937_none_bca63c14778a1254.manifest

File version

Not applicable

File size

2,074

Date (UTC)

08-Feb-2014

Time (UTC)

06:03

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 8 and Windows Server 2012

File property

Value

File name

Amd64_mf.inf_31bf3856ad364e35_6.2.9200.16817_none_1850daa516b9abde.manifest

File version

Not applicable

File size

2,078

Date (UTC)

08-Feb-2014

Time (UTC)

08:15

Platform

Not applicable

File name

Amd64_mf.inf_31bf3856ad364e35_6.2.9200.20937_none_18c4d7982fe7838a.manifest

File version

Not applicable

File size

2,078

Date (UTC)

08-Feb-2014

Time (UTC)

08:01

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,795

Date (UTC)

10-Feb-2014

Time (UTC)

17:10

Platform

Not applicable

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_mf.inf_31bf3856ad364e35_6.1.7601.18332_none_c128285beb853948.manifest

File version

Not Applicable

File size

2,057

Date (UTC)

04-Dec-2013

Time (UTC)

02:29

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

X86_mf.inf_31bf3856ad364e35_6.1.7601.22530_none_c1afc67904a4a38b.manifest

File version

Not Applicable

File size

2,057

Date (UTC)

04-Dec-2013

Time (UTC)

02:32

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

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

File name

Amd64_mf.inf_31bf3856ad364e35_6.1.7601.18332_none_1d46c3dfa3e2aa7e.manifest

File version

Not Applicable

File size

2,061

Date (UTC)

04-Dec-2013

Time (UTC)

02:54

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

Amd64_mf.inf_31bf3856ad364e35_6.1.7601.22530_none_1dce61fcbd0214c1.manifest

File version

Not Applicable

File size

2,061

Date (UTC)

04-Dec-2013

Time (UTC)

03:00

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

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

File name

Ia64_mf.inf_31bf3856ad364e35_6.1.7601.18332_none_c129cc51eb834244.manifest

File version

Not Applicable

File size

2,059

Date (UTC)

04-Dec-2013

Time (UTC)

02:19

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable

File name

Ia64_mf.inf_31bf3856ad364e35_6.1.7601.22530_none_c1b16a6f04a2ac87.manifest

File version

Not Applicable

File size

2,059

Date (UTC)

04-Dec-2013

Time (UTC)

02:23

SHA-1 hash

Not Applicable

MD5 hash

Not Applicable


References

See the terminology Microsoft uses to describe software updates for more information.

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

What affected your experience?

Thank you for your feedback!

×