Symptoms

When you install an update by using Windows Update Stand-Alone Installer (WUSA) in Windows 8.1 or Windows Server 2012 R2, WUSA may occasionally freeze. This causes the update installation to fail.

Resolution

Update information


Microsoft Download Center

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.

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

Update for Windows 8.1 (KB2949809)

Update for Windows 8.1 for x64-based Systems (KB2949809)

Update for Windows Server 2012 R2 (KB2949809)


Prerequisites

To apply this hotfix, you must have Windows 8.1 or Windows Server 2012 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 8.1 and Windows Server 2012 R2 file information and notesImportant 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 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 for Windows 8.1 and Windows Server 2012 R2" 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 8.1

File name

File version

File size

Date

Time

Platform

Wusa.exe

6.3.9600.16658

305,152

13-Mar-2014

04:39

x86

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

File name

File version

File size

Date

Time

Platform

Wusa.exe

6.3.9600.16658

308,224

13-Mar-2014

05:32

x64

For all supported ARM-based versions of Windows 8.1

File name

File version

File size

Date

Time

Platform

Wusa.exe

6.3.9600.16658

298,496

13-Mar-2014

03:55

Not applicable

Additional file information for Windows 8.1 and Windows Server 2012 R2

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

File name

Package_1_for_kb2949809~31bf3856ad364e35~x86~~6.3.1.0.mum

File version

Not applicabl

File size

1,819

Date (UTC)

13-Mar-2014

Time (UTC)

16:51

Platform

Not applicabl

File name

Package_for_kb2949809_rtm~31bf3856ad364e35~x86~~6.3.1.0.mum

File version

Not applicabl

File size

1,463

Date (UTC)

13-Mar-2014

Time (UTC)

16:51

Platform

Not applicabl

File name

X86_6578f4ea2d485ee288e15b8a01706b67_31bf3856ad364e35_6.3.9600.16658_none_e6a759d28c5b0ddd.manifest

File version

Not applicabl

File size

692

Date (UTC)

13-Mar-2014

Time (UTC)

16:51

Platform

Not applicabl

File name

X86_microsoft-windows-wusa_31bf3856ad364e35_6.3.9600.16658_none_41c4cca2341a7968.manifest

File version

Not applicabl

File size

15,945

Date (UTC)

13-Mar-2014

Time (UTC)

06:38

Platform

Not applicabl

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

File name

Amd64_6578f4ea2d485ee288e15b8a01706b67_31bf3856ad364e35_6.3.9600.16658_none_42c5f55644b87f13.manifest

File version

Not applicabl

File size

694

Date (UTC)

13-Mar-2014

Time (UTC)

16:51

Platform

Not applicabl

File name

Amd64_ac103ccfb3cdeb3bd0056678b3777566_31bf3856ad364e35_6.3.9600.16658_none_1e414b1ee15ca3c6.manifest

File version

Not applicabl

File size

696

Date (UTC)

13-Mar-2014

Time (UTC)

16:51

Platform

Not applicabl

File name

Amd64_microsoft-windows-wusa_31bf3856ad364e35_6.3.9600.16658_none_9de36825ec77ea9e.manifest

File version

Not applicabl

File size

15,949

Date (UTC)

13-Mar-2014

Time (UTC)

08:31

Platform

Not applicabl

File name

Package_1_for_kb2949809~31bf3856ad364e35~amd64~~6.3.1.0.mum

File version

Not applicabl

File size

2,270

Date (UTC)

13-Mar-2014

Time (UTC)

16:51

Platform

Not applicabl

File name

Package_2_for_kb2949809~31bf3856ad364e35~amd64~~6.3.1.0.mum

File version

Not applicabl

File size

2,280

Date (UTC)

13-Mar-2014

Time (UTC)

16:51

Platform

Not applicabl

File name

Package_for_kb2949809_rtm~31bf3856ad364e35~amd64~~6.3.1.0.mum

File version

Not applicabl

File size

2,644

Date (UTC)

13-Mar-2014

Time (UTC)

16:51

Platform

Not applicabl

File name

X86_microsoft-windows-wusa_31bf3856ad364e35_6.3.9600.16658_none_41c4cca2341a7968.manifest

File version

Not applicabl

File size

15,945

Date (UTC)

13-Mar-2014

Time (UTC)

06:38

Platform

Not applicabl

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

File name

Arm_a747f814fd548aa972363865bfcf21d8_31bf3856ad364e35_6.3.9600.16658_none_6c25371506d61bcf.manifest

File version

Not applicabl

File size

692

Date (UTC)

13-Mar-2014

Time (UTC)

16:51

Platform

Not applicabl

File name

Arm_microsoft-windows-wusa_31bf3856ad364e35_6.3.9600.16658_none_41c73efa3417982e.manifest

File version

Not applicabl

File size

15,945

Date (UTC)

13-Mar-2014

Time (UTC)

05:54

Platform

Not applicabl

File name

Package_1_for_kb2949809~31bf3856ad364e35~arm~~6.3.1.0.mum

File version

Not applicabl

File size

1,819

Date (UTC)

13-Mar-2014

Time (UTC)

16:51

Platform

Not applicabl

File name

Package_for_kb2949809_rtm~31bf3856ad364e35~arm~~6.3.1.0.mum

File version

Not applicabl

File size

1,463

Date (UTC)

13-Mar-2014

Time (UTC)

16:51

Platform

Not applicabl


Status

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

References

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

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