Symptoms

A computer that's running Windows 8.1, Windows Server 2012 R2, Windows 8 or Windows Server 2012 may freeze during disk I/O.

Resolution

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 be running in one of the following operating systems:

  • Windows 8.1

  • Windows Server 2012 R2

  • Windows 8

  • Windows Server 2012

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 notes

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

    RTM

    GDR

For Windows RT 8.1

File name

File version

File size

Date

Time

Platform

Ntfs.sys

6.3.9600.16519

1,483,624

22-Jan-2014

07:44

Not applicable

For all supported x86-based versions of Windows 8.1

File name

File version

File size

Date

Time

Platform

Ntfs.sys

6.3.9600.16519

1,674,584

22-Jan-2014

11:34

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

Ntfs.sys

6.3.9600.16519

2,010,456

22-Jan-2014

13:30

x64

Windows 8 and Windows Server 2012 file information and 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, 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

    6.2.920 0.21 xxx

    Windows 8 and Windows Server 2012

    RTM

    LDR

    6.2.920 0.16 xxx

    Windows 8 and Windows Server 2012

    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 for Windows 8 and Windows Server 2012" 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 8

File name

File version

File size

Date

Time

Platform

Ntfs.sys

6.2.9200.16931

1,618,264

26-May-2014

23:17

x86

Ntfs.sys

6.2.9200.21055

1,615,704

26-May-2014

22:57

x86

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

File name

File version

File size

Date

Time

Platform

Ntfs.sys

6.2.9200.16931

1,939,800

27-May-2014

01:18

x64

Ntfs.sys

6.2.9200.21055

1,938,264

27-May-2014

01:31

x64

Status

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

More Information

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_589cf295bae810e4f8d924715c651b8d_31bf3856ad364e35_6.3.9600.16519_none_d5e073db9456b7dd.manifest

File version

Not applicable

File size

692

Date (UTC)

24-Jan-2014

Time (UTC)

19:32

Platform

Not applicable

File name

Arm_microsoft-windows-ntfs_31bf3856ad364e35_6.3.9600.16519_none_3b64154e38450301.manifest

File version

Not applicable

File size

16,005

Date (UTC)

22-Jan-2014

Time (UTC)

07:53

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,834

Date (UTC)

24-Jan-2014

Time (UTC)

19:32

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

1,834

Date (UTC)

24-Jan-2014

Time (UTC)

19:32

Platform

Not applicable

File name

X86_29cc57033f5051aeb77cdaf43d0e9b27_31bf3856ad364e35_6.3.9600.16519_none_54b096990a7e928d.manifest

File version

Not applicable

File size

692

Date (UTC)

24-Jan-2014

Time (UTC)

19:32

Platform

Not applicable

File name

X86_microsoft-windows-ntfs_31bf3856ad364e35_6.3.9600.16519_none_3b61a2f63847e43b.manifest

File version

Not applicable

File size

16,005

Date (UTC)

22-Jan-2014

Time (UTC)

11:59

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_5e615f424bbd5b59e72ea24fe3785137_31bf3856ad364e35_6.3.9600.16519_none_c3246450055d873d.manifest

File version

Not applicable

File size

696

Date (UTC)

24-Jan-2014

Time (UTC)

19:32

Platform

Not applicable

File name

Amd64_microsoft-windows-ntfs_31bf3856ad364e35_6.3.9600.16519_none_97803e79f0a55571.manifest

File version

Not applicable

File size

16,011

Date (UTC)

22-Jan-2014

Time (UTC)

15:36

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

2,070

Date (UTC)

24-Jan-2014

Time (UTC)

19:32

Platform

Not applicable

Additional file information for Windows 8 and Windows Server 2012

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

File property

Value

File name

X86_046ddb3c1b8a40548f3a4592fc147c02_31bf3856ad364e35_6.2.9200.16933_none_92a96ef658fafffb.manifest

File version

Not applicable

File size

692

Date (UTC)

27-May-2014

Time (UTC)

11:51

Platform

Not applicable

File name

X86_e09bf7d18a2e7b38d0e323406d71808e_31bf3856ad364e35_6.2.9200.21057_none_7ce73e97d07c1a6b.manifest

File version

Not applicable

File size

692

Date (UTC)

27-May-2014

Time (UTC)

11:51

Platform

Not applicable

File name

X86_microsoft-windows-ntfs_31bf3856ad364e35_6.2.9200.16933_none_a3515053ee2aa832.manifest

File version

Not applicable

File size

15,737

Date (UTC)

26-May-2014

Time (UTC)

23:27

Platform

Not applicable

File name

X86_microsoft-windows-ntfs_31bf3856ad364e35_6.2.9200.21057_none_a3c924ab07551b55.manifest

File version

Not applicable

File size

15,737

Date (UTC)

26-May-2014

Time (UTC)

23:19

Platform

Not applicable

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

File property

Value

File name

Amd64_835b37dfc556fba57d64e15fc98f8158_31bf3856ad364e35_6.2.9200.21057_none_8bdb20605b32ebc8.manifest

File version

Not applicable

File size

696

Date (UTC)

27-May-2014

Time (UTC)

13:17

Platform

Not applicable

File name

Amd64_fcbf3c1d62dfa12b8a879c8277cea085_31bf3856ad364e35_6.2.9200.16933_none_fa836bdb1159b5c2.manifest

File version

Not applicable

File size

696

Date (UTC)

27-May-2014

Time (UTC)

13:17

Platform

Not applicable

File name

Amd64_microsoft-windows-ntfs_31bf3856ad364e35_6.2.9200.16933_none_ff6febd7a6881968.manifest

File version

Not applicable

File size

15,743

Date (UTC)

27-May-2014

Time (UTC)

01:28

Platform

Not applicable

File name

Amd64_microsoft-windows-ntfs_31bf3856ad364e35_6.2.9200.21057_none_ffe7c02ebfb28c8b.manifest

File version

Not applicable

File size

15,743

Date (UTC)

27-May-2014

Time (UTC)

01:38

Platform

Not applicable

References

Learn about the terminology that Microsoft uses to describe software updates.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

Need more help?

Want more options?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.