This article describes an update that improves the compatibility experience in Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2. Microsoft regularly releases Windows compatibility updates to improve the overall user experience. For more information about these improvements, see the "Applications or devices that experience a change in behavior after you install this update" section and the "Applications and devices that are included in this update" section.

How to obtain this update

Important Do not install a language pack after you install this update. Otherwise, the language-specific changes in the update will not be applied, and you will have to reinstall the update. For more information, see Add language packs to Windows.

Method 1: Windows Update

This update is provided as an optional update on Windows Update. For more information about how to run Windows Update, see How to get an update through Windows Update.

Method 2: 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 8.1

Download Download the package now.

All supported x64-based versions of Windows 8.1

Download Download the package now.

All supported x64-based versions of Windows Server 2012 R2

Download Download the package now.

Note The update for Windows RT 8.1 can be obtained only from Windows Update. 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.

Update information

The kinds of problems that are resolved by application compatibility updates

When you try to install and run certain games or applications on Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2, you may experience one or more of the following symptoms:

  • The game, the application, or the driver is installed incorrectly.

  • The game, the application, or the driver causes system instability.

  • The primary functions of the game, the application, or the firmware do not work correctly.

Applications or devices that experience a change in behavior after you install this update

The following table lists the applications and devices that are affected by this cumulative update package. This table also describes the behavior of these applications and devices after you install the update.Compatibility updates trigger several changes in Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2. The most common changes are as follows.

Hard block

A hard block prevents an application that is incompatible with Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2 from running on the system.Note Microsoft lets Windows put a hard block on a non-Microsoft application only if the manufacturer is notified.

Soft block

A soft block notifies you when a primary function of the application may not work or may cause application instability.

Driver block

A driver block may block an existing driver on your computer. When the driver is migrated during the upgrade, an Inbox driver will be installed.

Applications and devices that are included in this update

Application or device

Version

Behavior after you install the update

Cypress EZ-USB

2135S

Mouse is recognized on USB 3.0 port.

AMD USB xHCI Controller

Not available

Random system crash is eliminated.

Intel Sunrise Point xHCI ControllerIntel Sunrise Point LP xHCI ControllerIntel Cherry View K xHCI Controller

Not available

Bluetooth file transfer finishes.

The global version of this update 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

  • 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

    6.3.960 0.17 xxx

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

    RTM

    GDR

  • 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" 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 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

Apphelp.dll

6.3.9600.17415

642,560

29-Oct-2014

02:00

x86

Sdbinst.exe

6.3.9600.17725

21,504

11-Mar-2015

01:09

x86

Shimeng.dll

6.3.9600.17415

5,632

29-Oct-2014

02:00

x86

Acres.dll

6.3.9600.16384

310,784

22-Aug-2013

04:16

x86

Sysmain.sdb

Not applicable

3,833,752

07-May-2015

13:14

Not applicable

Msimain.sdb

Not applicable

2,726,550

07-May-2015

13:14

Not applicable

Acgenral.dll

6.3.9600.17824

2,490,368

07-May-2015

15:23

x86

Acwinrt.dll

6.3.9600.17415

8,704

29-Oct-2014

01:01

x86

Acspecfc.dll

6.3.9600.17725

449,024

11-Mar-2015

00:35

x86

Drvmain.sdb

Not applicable

122,014

07-May-2015

13:14

Not applicable

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

File name

File version

File size

Date

Time

Platform

Apphelp.dll

6.3.9600.17824

564,224

07-May-2015

16:47

x64

Sdbinst.exe

6.3.9600.17725

24,576

11-Mar-2015

01:49

x64

Shimeng.dll

6.3.9600.17415

7,168

29-Oct-2014

02:45

x64

Sysmain.sdb

Not applicable

433,488

07-May-2015

13:15

Not applicable

Msimain.sdb

Not applicable

2,756,926

07-May-2015

13:15

Not applicable

Acgenral.dll

6.3.9600.17725

317,440

11-Mar-2015

00:58

x64

Acwinrt.dll

6.3.9600.17415

10,752

29-Oct-2014

01:21

x64

Acspecfc.dll

6.3.9600.17725

42,496

11-Mar-2015

01:05

x64

Drvmain.sdb

Not applicable

123,292

07-May-2015

13:15

Not applicable

Apphelp.dll

6.3.9600.17415

642,560

29-Oct-2014

02:00

x86

Sdbinst.exe

6.3.9600.17725

21,504

11-Mar-2015

01:09

x86

Shimeng.dll

6.3.9600.17415

5,632

29-Oct-2014

02:00

x86

Acres.dll

6.3.9600.16384

310,784

22-Aug-2013

04:16

x86

Sysmain.sdb

Not applicable

3,833,752

07-May-2015

13:14

Not applicable

Acgenral.dll

6.3.9600.17824

2,490,368

07-May-2015

15:23

x86

Acwinrt.dll

6.3.9600.17415

8,704

29-Oct-2014

01:01

x86

Acspecfc.dll

6.3.9600.17725

449,024

11-Mar-2015

00:35

x86

For all supported versions of Windows RT 8.1

File name

File version

File size

Date

Time

Platform

Apphelp.dll

6.3.9600.17824

397,312

07-May-2015

15:45

Not applicable

Sdbinst.exe

6.3.9600.17824

20,992

07-May-2015

15:39

Not applicable

Shimeng.dll

6.3.9600.17031

6,144

22-Feb-2014

09:59

Not applicable

Acres.dll

6.3.9600.16384

310,784

22-Aug-2013

03:16

Not applicable

Sysmain.sdb

Not applicable

39,336

07-May-2015

13:14

Not applicable

Msimain.sdb

Not applicable

286

07-May-2015

13:14

Not applicable

Acgenral.dll

6.3.9600.17824

9,728

07-May-2015

15:45

Not applicable

Acwinrt.dll

6.3.9600.16384

8,704

22-Aug-2013

02:15

Not applicable

Acspecfc.dll

6.3.9600.17824

9,728

07-May-2015

15:27

Not applicable

Drvmain.sdb

Not applicable

62,614

07-May-2015

13:14

Not applicable

Additional file information

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 property

Value

File name

X86_15032462008f724048cd0baeb0d8cc61_31bf3856ad364e35_6.3.9600.17824_none_5f8411d8146a9659.manifest

File version

Not applicable

File size

725

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

X86_492c2a56f07afe44dc7af94bb5875d7b_31bf3856ad364e35_6.3.9600.17824_none_8b7e4dacd33650b4.manifest

File version

Not applicable

File size

725

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

X86_72c2837b1231a97fb14dc37daf92761f_31bf3856ad364e35_6.3.9600.17824_none_1563bc3e00e4d717.manifest

File version

Not applicable

File size

725

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

X86_9473ceebec0251dceb0f2683379659eb_31bf3856ad364e35_6.3.9600.17824_none_f2c6eace09c1f06e.manifest

File version

Not applicable

File size

725

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

X86_de098ad773b45dd1ac20714d5feee372_31bf3856ad364e35_6.3.9600.17824_none_62b0196cd675f089.manifest

File version

Not applicable

File size

725

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

X86_dfb6d29242eafdfc587f90a0dc3a6883_31bf3856ad364e35_6.3.9600.17824_none_b41d366e4a13a105.manifest

File version

Not applicable

File size

725

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

X86_microsoft-windows-a..ence-infrastructure_31bf3856ad364e35_6.3.9600.17824_none_69f19a836822cfbf.manifest

File version

Not applicable

File size

13,037

Date (UTC)

08-May-2015

Time (UTC)

19:13

Platform

Not applicable

File name

X86_microsoft-windows-a..ence-mitigations-c1_31bf3856ad364e35_6.3.9600.17824_none_a102ceef0db564c9.manifest

File version

Not applicable

File size

3,312

Date (UTC)

08-May-2015

Time (UTC)

19:13

Platform

Not applicable

File name

X86_microsoft-windows-a..ence-mitigations-c2_31bf3856ad364e35_6.3.9600.17824_none_a103cf390db47e20.manifest

File version

Not applicable

File size

2,558

Date (UTC)

07-May-2015

Time (UTC)

17:02

Platform

Not applicable

File name

X86_microsoft-windows-a..ence-mitigations-c3_31bf3856ad364e35_6.3.9600.17824_none_a104cf830db39777.manifest

File version

Not applicable

File size

3,310

Date (UTC)

08-May-2015

Time (UTC)

19:13

Platform

Not applicable

File name

X86_microsoft-windows-a..ence-mitigations-c4_31bf3856ad364e35_6.3.9600.17824_none_a105cfcd0db2b0ce.manifest

File version

Not applicable

File size

2,555

Date (UTC)

08-May-2015

Time (UTC)

19:13

Platform

Not applicable

File name

X86_microsoft-windows-a..ence-mitigations-c7_31bf3856ad364e35_6.3.9600.17824_none_a108d0ab0daffcd3.manifest

File version

Not applicable

File size

1,867

Date (UTC)

07-May-2015

Time (UTC)

17:02

Platform

Not applicable

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

File property

Value

File name

Amd64_0ff364ef509f2dbafe19b9a6854517b5_31bf3856ad364e35_6.3.9600.17824_none_db03788261ab2ca2.manifest

File version

Not applicable

File size

729

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

Amd64_141a9dc5296a0b37f5f6e29be11d8e33_31bf3856ad364e35_6.3.9600.17824_none_27dc52aca4b5e6a0.manifest

File version

Not applicable

File size

729

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

Amd64_147161ec534a03a72cd4f76d7831a40e_31bf3856ad364e35_6.3.9600.17824_none_9e431b7f8992fe2e.manifest

File version

Not applicable

File size

729

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

Amd64_426b1fbfdd376c7bc5e1fe5ded320618_31bf3856ad364e35_6.3.9600.17824_none_dc9fff9c2bcc65d7.manifest

File version

Not applicable

File size

729

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

Amd64_492c2a56f07afe44dc7af94bb5875d7b_31bf3856ad364e35_6.3.9600.17824_none_e79ce9308b93c1ea.manifest

File version

Not applicable

File size

727

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

Amd64_4da2aeae74b774fe377e3810f6949f76_31bf3856ad364e35_6.3.9600.17824_none_fb8a8ec115c14791.manifest

File version

Not applicable

File size

729

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

Amd64_53e82f6b62e98530e7a93cb9d6cbf6ac_31bf3856ad364e35_6.3.9600.17824_none_4e96b867d0ceecec.manifest

File version

Not applicable

File size

729

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

Amd64_72c2837b1231a97fb14dc37daf92761f_31bf3856ad364e35_6.3.9600.17824_none_718257c1b942484d.manifest

File version

Not applicable

File size

727

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

Amd64_936d8635205c6df61c4bb0a9ee5e084c_31bf3856ad364e35_6.3.9600.17824_none_8dd7a52038e318fc.manifest

File version

Not applicable

File size

729

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

Amd64_9567306217e281644f0211735764bfab_31bf3856ad364e35_6.3.9600.17824_none_add6208334769eca.manifest

File version

Not applicable

File size

729

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

Amd64_a7d4222603e8c724d1c010ec7592128d_31bf3856ad364e35_6.3.9600.17824_none_d6c34ae0c21686cc.manifest

File version

Not applicable

File size

729

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

Amd64_fdecb5d37a7dd723164cd92d71fe995b_31bf3856ad364e35_6.3.9600.17824_none_63cf30bda918536f.manifest

File version

Not applicable

File size

729

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

Amd64_microsoft-windows-a..ence-infrastructure_31bf3856ad364e35_6.3.9600.17824_none_c6103607208040f5.manifest

File version

Not applicable

File size

13,368

Date (UTC)

08-May-2015

Time (UTC)

19:17

Platform

Not applicable

File name

Amd64_microsoft-windows-a..ence-mitigations-c1_31bf3856ad364e35_6.3.9600.17824_none_fd216a72c612d5ff.manifest

File version

Not applicable

File size

2,573

Date (UTC)

07-May-2015

Time (UTC)

18:09

Platform

Not applicable

File name

Amd64_microsoft-windows-a..ence-mitigations-c2_31bf3856ad364e35_6.3.9600.17824_none_fd226abcc611ef56.manifest

File version

Not applicable

File size

2,562

Date (UTC)

07-May-2015

Time (UTC)

18:09

Platform

Not applicable

File name

Amd64_microsoft-windows-a..ence-mitigations-c3_31bf3856ad364e35_6.3.9600.17824_none_fd236b06c61108ad.manifest

File version

Not applicable

File size

3,336

Date (UTC)

08-May-2015

Time (UTC)

19:17

Platform

Not applicable

File name

Amd64_microsoft-windows-a..ence-mitigations-c4_31bf3856ad364e35_6.3.9600.17824_none_fd246b50c6102204.manifest

File version

Not applicable

File size

2,570

Date (UTC)

08-May-2015

Time (UTC)

19:17

Platform

Not applicable

File name

Amd64_microsoft-windows-a..ence-mitigations-c7_31bf3856ad364e35_6.3.9600.17824_none_fd276c2ec60d6e09.manifest

File version

Not applicable

File size

1,869

Date (UTC)

07-May-2015

Time (UTC)

18:09

Platform

Not applicable

File name

Wow64_microsoft-windows-a..ence-infrastructure_31bf3856ad364e35_6.3.9600.17824_none_d064e05954e102f0.manifest

File version

Not applicable

File size

13,039

Date (UTC)

08-May-2015

Time (UTC)

19:17

Platform

Not applicable

File name

Wow64_microsoft-windows-a..ence-mitigations-c1_31bf3856ad364e35_6.3.9600.17824_none_077614c4fa7397fa.manifest

File version

Not applicable

File size

3,314

Date (UTC)

08-May-2015

Time (UTC)

19:17

Platform

Not applicable

File name

Wow64_microsoft-windows-a..ence-mitigations-c2_31bf3856ad364e35_6.3.9600.17824_none_0777150efa72b151.manifest

File version

Not applicable

File size

1,141

Date (UTC)

07-May-2015

Time (UTC)

17:02

Platform

Not applicable

File name

Wow64_microsoft-windows-a..ence-mitigations-c7_31bf3856ad364e35_6.3.9600.17824_none_077c1680fa6e3004.manifest

File version

Not applicable

File size

450

Date (UTC)

07-May-2015

Time (UTC)

17:02

Platform

Not applicable

File name

X86_microsoft-windows-a..ence-mitigations-c3_31bf3856ad364e35_6.3.9600.17824_none_a104cf830db39777.manifest

File version

Not applicable

File size

3,310

Date (UTC)

08-May-2015

Time (UTC)

19:17

Platform

Not applicable

File name

X86_microsoft-windows-a..ence-mitigations-c4_31bf3856ad364e35_6.3.9600.17824_none_a105cfcd0db2b0ce.manifest

File version

Not applicable

File size

2,555

Date (UTC)

08-May-2015

Time (UTC)

19:17

Platform

Not applicable

Additional files for all supported versions of Windows RT 8.1

File property

Value

File name

Arm_2bfba980a71a7f2d13185f2ebfdcb7d4_31bf3856ad364e35_6.3.9600.17824_none_2bed4b2d5b97ac61.manifest

File version

Not applicable

File size

725

Date (UTC)

08-May-2015

Time (UTC)

19:09

Platform

Not applicable

File name

Arm_5c3ac168946372d9777bfe641ab304d0_31bf3856ad364e35_6.3.9600.17824_none_d03c183cb033839a.manifest

File version

Not applicable

File size

725

Date (UTC)

08-May-2015

Time (UTC)

19:09

Platform

Not applicable

File name

Arm_5fda7dda1ff2d44bcd941daf62b2bbe5_31bf3856ad364e35_6.3.9600.17824_none_26e126144ab54ee6.manifest

File version

Not applicable

File size

725

Date (UTC)

08-May-2015

Time (UTC)

19:09

Platform

Not applicable

File name

Arm_61e9fcece2f5c7d6deae29ba50b6e575_31bf3856ad364e35_6.3.9600.17824_none_0ded5b69e2a57e73.manifest

File version

Not applicable

File size

725

Date (UTC)

08-May-2015

Time (UTC)

19:09

Platform

Not applicable

File name

Arm_6608352bc2806491d59fc2a8eeafeeda_31bf3856ad364e35_6.3.9600.17824_none_2c7f12fe6f73175e.manifest

File version

Not applicable

File size

725

Date (UTC)

08-May-2015

Time (UTC)

19:09

Platform

Not applicable

File name

Arm_74af7a1b1f157f81bd09ced6fd1e7372_31bf3856ad364e35_6.3.9600.17824_none_75542cbdf2c0cddb.manifest

File version

Not applicable

File size

725

Date (UTC)

08-May-2015

Time (UTC)

19:09

Platform

Not applicable

File name

Arm_microsoft-windows-a..ence-infrastructure_31bf3856ad364e35_6.3.9600.17824_none_69f40cdb681fee85.manifest

File version

Not applicable

File size

13,037

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

Arm_microsoft-windows-a..ence-mitigations-c1_31bf3856ad364e35_6.3.9600.17824_none_a10541470db2838f.manifest

File version

Not applicable

File size

3,312

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

Arm_microsoft-windows-a..ence-mitigations-c2_31bf3856ad364e35_6.3.9600.17824_none_a10641910db19ce6.manifest

File version

Not applicable

File size

2,558

Date (UTC)

07-May-2015

Time (UTC)

16:38

Platform

Not applicable

File name

Arm_microsoft-windows-a..ence-mitigations-c3_31bf3856ad364e35_6.3.9600.17824_none_a10741db0db0b63d.manifest

File version

Not applicable

File size

3,310

Date (UTC)

08-May-2015

Time (UTC)

19:10

Platform

Not applicable

File name

Arm_microsoft-windows-a..ence-mitigations-c4_31bf3856ad364e35_6.3.9600.17824_none_a10842250dafcf94.manifest

File version

Not applicable

File size

2,552

Date (UTC)

07-May-2015

Time (UTC)

16:38

Platform

Not applicable

File name

Arm_microsoft-windows-a..ence-mitigations-c7_31bf3856ad364e35_6.3.9600.17824_none_a10b43030dad1b99.manifest

File version

Not applicable

File size

1,867

Date (UTC)

07-May-2015

Time (UTC)

16:38

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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