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System malfunction because memory leak occurs in dwm.exe in Windows 7 or Windows Server 2008 R2

This article describes an issue in which a memory leak occurs in Desktop Window Manager (dwm.exe) in Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 SP1. An update is available to resolve this issue. Before you install this update, check out the Prerequisites section.
Symptoms
This issue occurs if an application displays various status windows for a long time. DWM leaks memory that is associated with these status windows. Eventually, the application cannot update warning or error status messages in the status windows.
How to obtain this update
Important 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.

Method 1: Windows Update

This update is provided as an Optional update on Windows Update. For more information on 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 systemUpdate
All supported x86-based versions of Windows 7DownloadDownload the package now.
All supported x64-based versions of Windows 7 DownloadDownload the package now.
All supported x64-based versions of Windows Server 2008 R2DownloadDownload the package now.
All supported IA-based versions of Windows Server 2008 R2DownloadDownload the package now.

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 detail information

Prerequisites

To install this update, install Service Pack 1 for Windows 7 or Windows Server 2008 R2.

Registry information

To apply this update, you do not have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this update.

Update replacement information

This update does not replace a previously released update.

File information

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 7 and Windows Server 2008 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
    6.1.760 1.18xxxWindows 7 or Windows Server 2008 R2 SP1GDR
    6.1.760 1.23 xxxWindows 7 or Windows Server 2008 R2 SP1 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 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 7
File nameFile versionFile sizeDateTimePlatform
Dwmapi.dll6.1.7601.1891767,58409-Jul-201517:42x86
Dwmcore.dll6.1.7601.189171,372,16009-Jul-201517:42x86
Dwmapi.dll6.1.7601.2312067,58409-Jul-201517:39x86
Dwmcore.dll6.1.7601.231201,372,16009-Jul-201517:39x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Dwmapi.dll6.1.7601.1891782,94409-Jul-201517:58x64
Dwmcore.dll6.1.7601.189171,632,25609-Jul-201517:58x64
Dwmapi.dll6.1.7601.2312082,94409-Jul-201518:03x64
Dwmcore.dll6.1.7601.231201,632,25609-Jul-201518:03x64
Dwmapi.dll6.1.7601.1891767,58409-Jul-201517:42x86
Dwmcore.dll6.1.7601.189171,372,16009-Jul-201517:42x86
Dwmapi.dll6.1.7601.2312067,58409-Jul-201517:39x86
Dwmcore.dll6.1.7601.231201,372,16009-Jul-201517:39x86

For all supported IA-64-based versions of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Dwmapi.dll6.1.7601.18917134,14409-Jul-201517:06IA-64
Dwmcore.dll6.1.7601.189172,907,64809-Jul-201517:06IA-64
Dwmapi.dll6.1.7601.23120134,14409-Jul-201517:06IA-64
Dwmcore.dll6.1.7601.231202,907,64809-Jul-201517:06IA-64
Dwmapi.dll6.1.7601.1891767,58409-Jul-201517:42x86
Dwmcore.dll6.1.7601.189171,372,16009-Jul-201517:42x86
Dwmapi.dll6.1.7601.2312067,58409-Jul-201517:39x86
Dwmcore.dll6.1.7601.231201,372,16009-Jul-201517:39x86

Additional file information


Additional file information for Windows 7 and for Windows Server 2008 R2


Additional files for all supported x86-based versions of Windows 7
File propertyValue
File nameX86_6ca6f733581cc788bb39a2a8cdbd170a_31bf3856ad364e35_6.1.7601.18917_none_2941a8837338c8bc.manifest
File versionNot applicable
File size712
Date (UTC)10-Jul-2015
Time (UTC)01:26
PlatformNot applicable
File nameX86_b5733a3774810e7362c273544e0c0b77_31bf3856ad364e35_6.1.7601.23120_none_7d13b74b155671a8.manifest
File versionNot applicable
File size712
Date (UTC)10-Jul-2015
Time (UTC)01:26
PlatformNot applicable
File nameX86_microsoft-windows-d..opwindowmanager-api_31bf3856ad364e35_6.1.7601.18917_none_e21940269e3cce41.manifest
File versionNot applicable
File size2,904
Date (UTC)09-Jul-2015
Time (UTC)18:14
PlatformNot applicable
File nameX86_microsoft-windows-d..opwindowmanager-api_31bf3856ad364e35_6.1.7601.23120_none_e290e321b7690bdd.manifest
File versionNot applicable
File size2,904
Date (UTC)09-Jul-2015
Time (UTC)18:09
PlatformNot applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File propertyValue
File nameAmd64_14bf3b24bcbf707c23cbf9d2c623472d_31bf3856ad364e35_6.1.7601.18917_none_7de36b46e3f868da.manifest
File versionNot applicable
File size716
Date (UTC)10-Jul-2015
Time (UTC)01:26
PlatformNot applicable
File nameAmd64_620566da198b11c5530306d21fd14a17_31bf3856ad364e35_6.1.7601.23120_none_ac4a144a51944aca.manifest
File versionNot applicable
File size1,072
Date (UTC)10-Jul-2015
Time (UTC)01:26
PlatformNot applicable
File nameAmd64_6ca6f733581cc788bb39a2a8cdbd170a_31bf3856ad364e35_6.1.7601.18917_none_856044072b9639f2.manifest
File versionNot applicable
File size714
Date (UTC)10-Jul-2015
Time (UTC)01:26
PlatformNot applicable
File nameAmd64_aa51ceff801c51e00f3230d4fe02613b_31bf3856ad364e35_6.1.7601.23120_none_8f7aada60cdfecb6.manifest
File versionNot applicable
File size716
Date (UTC)10-Jul-2015
Time (UTC)01:26
PlatformNot applicable
File nameAmd64_b5733a3774810e7362c273544e0c0b77_31bf3856ad364e35_6.1.7601.23120_none_d93252cecdb3e2de.manifest
File versionNot applicable
File size714
Date (UTC)10-Jul-2015
Time (UTC)01:26
PlatformNot applicable
File nameAmd64_d3088c7acff68e2aec2f0c3ddaf1e5e3_31bf3856ad364e35_6.1.7601.18917_none_c95f67cbf8bb77cd.manifest
File versionNot applicable
File size1,072
Date (UTC)10-Jul-2015
Time (UTC)01:26
PlatformNot applicable
File nameAmd64_microsoft-windows-d..opwindowmanager-api_31bf3856ad364e35_6.1.7601.18917_none_3e37dbaa569a3f77.manifest
File versionNot applicable
File size2,906
Date (UTC)09-Jul-2015
Time (UTC)18:31
PlatformNot applicable
File nameAmd64_microsoft-windows-d..opwindowmanager-api_31bf3856ad364e35_6.1.7601.23120_none_3eaf7ea56fc67d13.manifest
File versionNot applicable
File size2,906
Date (UTC)09-Jul-2015
Time (UTC)18:34
PlatformNot applicable
File nameX86_microsoft-windows-d..opwindowmanager-api_31bf3856ad364e35_6.1.7601.18917_none_e21940269e3cce41.manifest
File versionNot applicable
File size2,904
Date (UTC)09-Jul-2015
Time (UTC)18:14
PlatformNot applicable
File nameX86_microsoft-windows-d..opwindowmanager-api_31bf3856ad364e35_6.1.7601.23120_none_e290e321b7690bdd.manifest
File versionNot applicable
File size2,904
Date (UTC)09-Jul-2015
Time (UTC)18:09
PlatformNot applicable

Additional files for all supported IA-64-based versions of Windows Server 2008 R2
File propertyValue
File nameIa64_4c6db2b28c2d25bba6be035616c41d8e_31bf3856ad364e35_6.1.7601.18917_none_e55c79659bcb403b.manifest
File versionNot applicable
File size1,070
Date (UTC)10-Jul-2015
Time (UTC)01:26
PlatformNot applicable
File nameIa64_9f9faf5aca6576247971376f523a52d5_31bf3856ad364e35_6.1.7601.23120_none_23b832549c2f1806.manifest
File versionNot applicable
File size1,070
Date (UTC)10-Jul-2015
Time (UTC)01:26
PlatformNot applicable
File nameIa64_microsoft-windows-d..opwindowmanager-api_31bf3856ad364e35_6.1.7601.18917_none_e21ae41c9e3ad73d.manifest
File versionNot applicable
File size2,905
Date (UTC)09-Jul-2015
Time (UTC)18:17
PlatformNot applicable
File nameIa64_microsoft-windows-d..opwindowmanager-api_31bf3856ad364e35_6.1.7601.23120_none_e2928717b76714d9.manifest
File versionNot applicable
File size2,905
Date (UTC)09-Jul-2015
Time (UTC)18:16
PlatformNot applicable
File nameX86_microsoft-windows-d..opwindowmanager-api_31bf3856ad364e35_6.1.7601.18917_none_e21940269e3cce41.manifest
File versionNot applicable
File size2,904
Date (UTC)09-Jul-2015
Time (UTC)18:14
PlatformNot applicable
File nameX86_microsoft-windows-d..opwindowmanager-api_31bf3856ad364e35_6.1.7601.23120_none_e290e321b7690bdd.manifest
File versionNot applicable
File size2,904
Date (UTC)09-Jul-2015
Time (UTC)18:09
PlatformNot 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.
Properties

Article ID: 3078667 - Last Review: 08/18/2015 16:09:00 - Revision: 1.0

Windows Server 2008 R2 Service Pack 1, Windows 7 Service Pack 1

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