Applies ToWindows 10 Windows 10, version 1511, all editions Windows Server 2012 R2 Datacenter Windows Server 2012 R2 Standard Windows Server 2012 R2 Essentials Windows Server 2012 R2 Foundation Windows 8.1 Enterprise Windows 8.1 Pro Windows 8.1 Windows RT 8.1 Windows Server 2012 Datacenter Windows Server 2012 Standard Windows Server 2012 Essentials Windows Server 2012 Foundation

The update that this article describes has been replaced by a newer update. We recommend that you install update 3163207 to address the vulnerabilities included in Adobe Security Bulletin APSB16-15. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

3163207 MS16-064: Security update for Adobe Flash Player: May 13, 2016

Summary

This update resolves vulnerabilities in Adobe Flash Player when installed on all supported editions of Windows Server 2012, Windows 8.1, Windows Server 2012 R2, Windows RT 8.1, Windows 10, and Windows 10 Version 1511. To learn more about the vulnerability, see Microsoft Security Bulletin MS16-064.

More Information

Important

  • All future security and non-security updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 require update 2919355 to be installed. We recommend that you install update 2919355 on your Windows RT 8.1-based, Windows 8.1-based, or Windows Server 2012 R2-based computer so that you receive future updates.

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

  • This security update applies to the Windows operating systems that are listed in the "Applies to" section in this article. If you want to install Adobe Flash Player update for an earlier version of Windows, try Adobe Flash Player Download.

How to obtain and install the update

Method 1: Windows Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, seeGet security updates automatically. Note For Windows RT 8.1, this update is available through Windows Update only.

You can obtain the stand-alone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update. Click the download link in Microsoft Security Bulletin MS16-064 that corresponds to the version of Windows that you are running.

More Information

Security CentralYou can manage the software and security updates that you have to deploy to the servers, desktops, and mobile systems in your organization. For more information, see the TechNet Update Management Center. TheMicrosoft TechNet Security website provides more information about security in Microsoft products. Security updates are available fromMicrosoft Update andWindows Update. Security updates are also available from theMicrosoft Download Center. You can find security updates most easily by doing a keyword search for "security update."You can download security updates from theMicrosoft Update Catalog. The Microsoft Update Catalog provides a searchable catalog of content that is made available through Windows Update and Microsoft Update. This includes security updates, drivers, and service packs. For more information about the Microsoft Update Catalog, see theMicrosoft Update Catalog FAQ.

Detection and deployment guidanceMicrosoft provides detection and deployment guidance for security updates. This guidance contains recommendations and information that can help IT professionals understand how to use various tools for detection and deployment of security updates. For more information, seeMicrosoft Knowledge Base article 961747.

Microsoft Baseline Security AnalyzerMicrosoft Baseline Security Analyzer (MBSA) lets administrators scan local and remote systems for missing security updates and common security misconfigurations. For more information, seeMicrosoft Baseline Security Analyzer. Note Customers who use legacy software that is not supported by the latest release of MBSA, Microsoft Update, and Windows Server Update Services should see the "Legacy Product Support" section ofMicrosoft Baseline Security Analyzer. Here they will find information about how to create comprehensive security update detection by using legacy tools.

Windows Server Update ServicesWindows Server Update Services (WSUS) lets information technology administrators deploy the latest Microsoft product updates to computers that are running Windows. For more information about how to deploy security updates by using Windows Server Update Services, see the following Microsoft TechNet article:

Windows Server Update Services

Systems Management ServerThe following table provides the Microsoft Systems Management Server (SMS) detection and deployment summary for this security update.

Software

SMS 2003 with ITMU

System Center Configuration Manager

Windows 8.1 for 32-bit systems

No

Yes

Windows 8.1 for 64-bit systems

No

Yes

Windows Server 2012 and Windows Server 2012 R2

No

Yes

Note Microsoft discontinued support for SMS 2.0 on April 12, 2011. For SMS 2003, Microsoft also discontinued support for the Security Update Inventory Tool (SUIT) on April 12, 2011. Customers are encouraged to upgrade toSystem Center Configuration Manager. For customers who remain on SMS 2003 Service Pack 3, the Inventory Tool for Microsoft Updates (ITMU) is also an option. For SMS 2003, the SMS 2003 Inventory Tool for Microsoft Updates (ITMU) can be used by SMS to detect security updates that are offered byMicrosoft Update and that are supported byWindows Server Update Services. For more information, see Systems Management Server 2003. For more information about SMS scanning tools, seeSystems Management Server 2003 Software Update Scanning Tools. See also Downloads for Systems Management Server 2003. System Center Configuration Manager uses WSUS 3.0 for detection of updates. For more information, seeSystem Center. For detailed information, seeMicrosoft Knowledge Base article 910723: Summary list of monthly detection and deployment guidance articles. Update Compatibility Evaluator and Application Compatibility ToolkitUpdates frequently write to the same files and registry settings that are required for your applications to run. This can trigger incompatibilities and increase the time that is required to deploy security updates. You can streamline the testing and validating of Windows updates against installed applications by using theUpdate Compatibility Evaluator components that are included in Application Compatibility Toolkit. The Application Compatibility Toolkit (ACT) contains the necessary tools and documentation to evaluate and decrease application compatibility issues before you deploy Windows Vista, a Windows update, a Microsoft Security update, or a new version of Windows Internet Explorer in your environment.

Windows 8.1 (all editions)

Reference tableThe following table contains the security update information for this software. You can find more information in the "Deployment information" section.

Deployment

Information

For Adobe Flash Player in Internet Explorer 11 on all supported 32-bit editions of Windows 8.1:Windows8.1-KB3157993-x86.msu /quiet

For Adobe Flash Player in Internet Explorer 11 on all supported x64-based editions of Windows 8.1:Windows8.1-KB3157993-x64.msu /quiet

For Adobe Flash Player in Internet Explorer 11 on all supported 32-bit editions of Windows 8.1:Windows8.1-KB3157993-x86.msu /quiet /norestart

For Adobe Flash Player in Internet Explorer 11 on all supported x64-based editions of Windows 8.1:Windows8.1-KB3157993-x64.msu /quiet /norestart

More information

See the "Detection and deployment tools and guidance" subsection.

Restart requirement

In some cases, this update does not require a restart. If the required files are being used, this update requires a restart. If this behavior occurs, you receive a message that advises you to restart. To help reduce the possibility that a restart will be required, you should stop all affected services and close all applications that may use the affected files before you install the security update. For more information about why you may be prompted to restart, seeMicrosoft Knowledge Base Article 887012.

Hotpatching

Not applicable

Removal information

To uninstall an update that was installed by WUSA, use the /Uninstall setup switch. Or, click Control Panel, click System and Security, click View installed updates under Windows Update, and then select from the list of updates.

Registry key verification

There is no registry key to validate the presence of this update.

Inclusion in future service packs

The update for this issue will be included in a future service pack or update rollup.

Deployment information

Installing the updateWhen you install this security update, the installer checks whether one or more of the files that are being updated on your system have previously been updated by a Microsoft hotfix. For more information about the terminology that appears in this Knowledge Base article, such as "hotfix," seeMicrosoft Knowledge Base article 824684. This security update supports the following installation switches.

Switch

Description

/?, /h, /help

Displays help about supported switches.

/quiet

Suppresses the display of status or error messages.

/norestart

When it is combined with /quiet, the system is not restarted after installation even if a restart is required to complete installation.

/warnrestart:<seconds>

When it is combined with /quiet, the installer warns the user before it begins the restart.

/promptrestart

When it is combined with /quiet, the installer prompts before it begins restart.

/forcerestart

When it is combined with /quiet, the installer forcibly closes applications and begins the restart.

/log:<file name>

Enables logging to the specified file.

/extract:<destination>

Extracts the package contents to the destination folder.

/uninstall /kb:<KB number>

Uninstalls the security update.

Note For more information about the Wusa.exe installer, see the "Windows Update Stand-alone Installer" section in the TechNet articleMiscellaneous Changes in Windows 7.

Verifying that the update was appliedBecause there are several editions of Windows, the following steps may be different on your system. If they are different, see your product documentation to complete these steps. Verifying the file version

  1. Click Start, and then type an update file name in the Search box.

  2. When the file appears under Programs, right-click the file name, and then click Properties.

  3. On the General tab, compare the file size with the file information tables that are provided in this Microsoft Knowledge Base article. Note Depending on the edition of the operating system or the programs that are installed on your system, some files that are listed in the file information table may not be installed.

  4. You can also click the Details tab and compare information, such as file version and date changed, with the file information tables that are provided in the Microsoft Knowledge Base article. Note Attributes other than the file version may change during installation. Comparing other file attributes to the information in the file information table is not a supported method of verifying that the update was applied. Also, in certain cases, files are renamed during installation. If the file or version information does not exist, use one of the other available methods to verify update installation.

  5. Finally, you can also click the Previous Versions tab and compare file information for the earlier version of the file together with the file information for the new, or updated, version of the file.

Windows Server 2012 and Windows Server 2012 R2 (all editions)

Reference tableThe following table contains the security update information for this software. You can find more information in the "Deployment information" subsection in this section.

Deployment

Information

Installing without requiring user intervention

For Adobe Flash Player in Internet Explorer 10 on all supported editions of Windows Server 2012:Windows8-RT-KB3157993-x64.msu /quiet

For Adobe Flash Player in Internet Explorer 11 on all supported editions of Windows Server 2012 R2:Windows8.1-KB3157993-x64.msu /quiet

Installing without restarting

For Adobe Flash Player in Internet Explorer 10 on all supported editions of Windows Server 2012:Windows8-RT-KB3157993-x64.msu /quiet /norestart

For Adobe Flash Player in Internet Explorer 11 on all supported editions of Windows Server 2012 R2:Windows8.1-KB3157993-x64.msu /quiet /norestart

More information

See the "Detection and deployment tools and Guidance" subsection.

Restart requirement

In some cases, this update does not require a restart. If the required files are being used, this update requires a restart. If this behavior occurs, you receive a message that advises you to restart. To help reduce the possibility that a restart will be required, you should stop all affected services and close all applications that may use the affected files before you install the security update. For more information about why you may be prompted to restart, seeMicrosoft Knowledge Base article 887012.

Hotpatching

Not applicable

Removal information

To uninstall an update that was installed by WUSA, use the /Uninstall setup switch. Or, click Control Panel, click System and Security, click View installed updates under Windows Update, and then select from the list of updates.

Registry key verification

A registry key does not exist to validate the presence of this update.

Inclusion in future service packs

The update for this issue will be included in a future service pack or update rollup.

Deployment information

Installing the updateWhen you install this security update, the installer checks whether one or more of the files that are being updated on your system were previously updated by a Microsoft hotfix. For more information about the terminology that appears in this Knowledge Base article, such as "hotfix," seeMicrosoft Knowledge Base article 824684. This security update supports the following installation switches.

Switch

Description

/?, /h, /help

Displays help about supported switches.

/quiet

Suppresses the display of status or error messages.

/norestart

When it is combined with/quiet, the system does not restart after the installation even if a restart is required to complete installation.

/warnrestart:<seconds>

When it is combined with /quiet, the installer warns the user before it begins the restart.

/promptrestart

When it is combined with /quiet, the installer prompts the user before it begins the restart.

/forcerestart

When it is combined with /quiet, the installer forcibly closes applications and begins the restart.

/log:<file name>

Enables logging to the specified file.

/extract:<destination>

Extracts the package contents to the destination folder.

/uninstall /kb:<KB number>

Uninstalls the security update.

Note For more information about the Wusa.exe installer, see "Windows Update Stand-alone Installer" in the following Microsoft TechNet article:

Miscellaneous Changes in Windows 7

Verifying that the update was appliedBecause there are several editions of Windows, the following steps may be different in your system. If they are different, see your product documentation to complete these steps. Verifying the file version

  1. Click Start, and then type an update file name in the Start Search box.

  2. When the file appears under Programs, right-click the file name, and then click Properties.

  3. On the General tab, compare the file size with the file information tables that are provided in the Knowledge Base article. Note Depending on the edition of the operating system or the programs that are installed in your system, some files that are listed in the file information table may not be installed.

  4. You can also click the Details tab to compare information, such as file version and date changed, with the file information tables that are provided in the Knowledge Base article. Note Attributes other than the file version may change during installation. Comparing other file attributes to the information in the file information table is not a supported method of verifying that the update was applied. Also, in certain cases, files may be renamed during installation. If the file or version information does not exist, use one of the other available methods to verify update installation.

  5. Finally, you can also click the Previous Versions tab, and then compare file information for the earlier version of the file with the file information for the new or updated version of the file.

Help for installing updates: Support for Microsoft UpdateSecurity solutions for IT professionals: TechNet Security Troubleshooting and SupportHelp for protecting your Windows-based computer from viruses and malware: Virus Solution and Security CenterLocal support according to your country: International Support

File Information

File name

SHA1 hash

SHA256 hash

Windows8.1-KB3157993-x86.msu

31BC33ADDABF7C3AB7249CB4C322761A1C66FAD0

AB2C640E7524082BDED45C3B2F368D2D53F3DDFE969925CF5296B2EE1119BD49

Windows10.0-KB3157993-x86.msu

A3343CF71BC0C9E67B3D31E365364CB7C8E6B36C

19B59AAE5FEFE768E3358BE91F7470DCB579847B628785A411E15BACB9A7871E

Windows10.0-KB3157993-x64.msu

DFE40A65DD39BB56EEE80245767ADD5B2A7503F2

3C1A591395A4AE4BD3D2F8BCA5A5FA371ED12E822B1E9A7DD58E518EFCEA06E7

Windows8.1-KB3157993-x64.msu

7C417DD8A0373F1C0BD77E41A66A4A7A86E60EA5

E0BD49895DC5D9D276C22937556AD015A178488A634C7544F0D89CB761BD3754

Windows8-RT-KB3157993-x64.msu

FBF62A88732575AE76B165ECB1FE7A6650C3C078

C6E3CCCBF3679D449A72DDE359AD7B3782B93DB1245BE03B3FE48A263D7F5109

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.

Windows 8.1 and Windows Server 2012 R2 file information

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 0.17 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 MUM files (.mum) that are installed are not listed.

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

Activex.vch

Not applicable

724,818

03-May-2016

01:15

Not applicable

Flash.ocx

21.0.0.241

21,551,608

03-May-2016

01:15

x86

Flashplayerapp.exe

21.0.0.241

829,944

03-May-2016

01:15

x86

Flashplayercplapp.cpl

21.0.0.241

176,632

03-May-2016

01:15

Not applicable

Flashutil_activex.dll

21.0.0.241

578,552

03-May-2016

01:15

x86

Flashutil_activex.exe

21.0.0.241

1,241,080

03-May-2016

01:15

x86

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Activex.vch

Not applicable

158,926

03-May-2016

01:15

Not applicable

Flash.ocx

21.0.0.241

27,939,312

03-May-2016

01:15

x64

Flashutil_activex.dll

21.0.0.241

656,888

03-May-2016

01:15

x64

Flashutil_activex.exe

21.0.0.241

899,056

03-May-2016

01:15

x64

Activex.vch

Not applicable

724,818

03-May-2016

01:15

Not applicable

Flash.ocx

21.0.0.241

21,551,608

03-May-2016

01:15

x86

Flashplayerapp.exe

21.0.0.241

829,944

03-May-2016

01:15

x86

Flashplayercplapp.cpl

21.0.0.241

176,632

03-May-2016

01:15

Not applicable

Flashutil_activex.dll

21.0.0.241

578,552

03-May-2016

01:15

x86

Flashutil_activex.exe

21.0.0.241

1,241,080

03-May-2016

01:15

x86

Windows 10 file information

For all supported x86-based versions

File name

File version

File size

Date

Time

Platform

Activex.vch

Not applicable

724,818

03-May-2016

01:19

Not applicable

Flash.ocx

21.0.0.241

21,551,608

03-May-2016

01:19

x86

Flashplayerapp.exe

21.0.0.241

829,944

03-May-2016

01:19

x86

Flashplayercplapp.cpl

21.0.0.241

176,632

03-May-2016

01:19

Not applicable

Flashutil_activex.dll

21.0.0.241

578,552

03-May-2016

01:19

x86

Flashutil_activex.exe

21.0.0.241

1,241,080

03-May-2016

01:19

x86

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Activex.vch

Not applicable

158,926

03-May-2016

01:19

Not applicable

Flash.ocx

21.0.0.241

27,939,312

03-May-2016

01:19

x64

Flashutil_activex.dll

21.0.0.241

656,888

03-May-2016

01:19

x64

Flashutil_activex.exe

21.0.0.241

899,056

03-May-2016

01:19

x64

Activex.vch

Not applicable

724,818

03-May-2016

01:19

Not applicable

Flash.ocx

21.0.0.241

21,551,608

03-May-2016

01:19

x86

Flashplayerapp.exe

21.0.0.241

829,944

03-May-2016

01:19

x86

Flashplayercplapp.cpl

21.0.0.241

176,632

03-May-2016

01:19

Not applicable

Flashutil_activex.dll

21.0.0.241

578,552

03-May-2016

01:19

x86

Flashutil_activex.exe

21.0.0.241

1,241,080

03-May-2016

01:19

x86

Windows Server 2012 file information

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

    6.2.920 0.17xxx

    Windows 8, Windows RT, or Windows Server 2012

    RTM

    GDR

    6.2.920 0.21xxx

    Windows 8, Windows RT, or 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 MUM files (.mum) that are installed are not listed.

For all supported x64-based versions

File name

File version

File size

Date

Time

Platform

Activex.vch

Not applicable

158,926

03-May-2016

01:17

Not applicable

Flash.ocx

21.0.0.241

27,938,776

03-May-2016

01:17

x64

Flashutil_activex.dll

21.0.0.241

656,344

03-May-2016

01:17

x64

Flashutil_activex.exe

21.0.0.241

898,520

03-May-2016

01:17

x64

Activex.vch

Not applicable

724,818

03-May-2016

01:17

Not applicable

Flash.ocx

21.0.0.241

21,551,064

03-May-2016

01:17

x86

Flashplayerapp.exe

21.0.0.241

829,408

03-May-2016

01:17

x86

Flashplayercplapp.cpl

21.0.0.241

176,096

03-May-2016

01:17

Not applicable

Flashutil_activex.dll

21.0.0.241

578,008

03-May-2016

01:17

x86

Flashutil_activex.exe

21.0.0.241

1,240,544

03-May-2016

01:17

x86

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