DWM.exe process consumes excessive CPU resources after a lock screen display time-out occurs

Symptoms

You have a computer that's running Windows 8 or Windows Server 2012. At the lock screen, and after a display time-out occurs, the DWM.exe process consumes a high percentage of CPU resources. This excessive CPU usage continues until you move the mouse pointer or touch the keyboard.

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 Windows 8 or 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 8 and Windows Server 2012 file information and notesImportant 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 0.16 xxx

    Windows 8 and Windows Server 2012

    RTM

    GDR

    6.2.920 0.20 xxx

    Windows 8 and Windows Server 2012

    RTM

    LDR

    6.2.920 0.21 xxx

    Windows 8 and Windows Server 2012

    RTM

    LDR

  • 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

Dwmcore.dll

6.2.9200.21007

1,840,640

05-Apr-2014

04:05

x86

Microsoft-windows-desktopwindowmanager-compositor.ptxml

Not Applicable

2,392

11-Oct-2012

00:39

Not Applicable

Dxgi.dll

6.2.9200.21007

366,080

05-Apr-2014

04:05

x86

Cdd.dll

6.2.9200.16384

166,400

26-Jul-2012

03:30

x86

Dxgkrnl.sys

6.2.9200.21007

1,228,632

05-Apr-2014

04:22

x86

Dxgmms1.sys

6.2.9200.20604

259,816

10-Jan-2013

05:52

x86

Lddmcore.ptxml

Not Applicable

1,151

25-Jul-2012

20:32

Not Applicable

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

File name

File version

File size

Date

Time

Platform

Dwmcore.dll

6.2.9200.21007

2,205,696

05-Apr-2014

04:31

x64

Microsoft-windows-desktopwindowmanager-compositor.ptxml

Not Applicable

2,392

11-Oct-2012

00:37

Not Applicable

Dxgi.dll

6.2.9200.21007

459,264

05-Apr-2014

04:31

x64

Cdd.dll

6.2.9200.20828

199,680

19-Sep-2013

07:44

x64

Dxgkrnl.sys

6.2.9200.21007

1,445,208

05-Apr-2014

07:12

x64

Dxgmms1.sys

6.2.9200.20604

303,848

10-Jan-2013

07:35

x64

Lddmcore.ptxml

Not Applicable

1,151

25-Jul-2012

20:29

Not Applicable

Dwmcore.dll

6.2.9200.21007

1,840,640

05-Apr-2014

04:05

x86

Microsoft-windows-desktopwindowmanager-compositor.ptxml

Not Applicable

2,392

11-Oct-2012

00:39

Not Applicable

Dxgi.dll

6.2.9200.21007

366,080

05-Apr-2014

04:05

x86

Additional file information

Additional file information for Windows 8 and for Windows Server 2012

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

File name

Package_1_for_kb2957979~31bf3856ad364e35~x86~~6.2.1.0.mum

File version

Not Applicable

File size

1,812

Date (UTC)

06-Apr-2014

Time (UTC)

18:06

Platform

Not Applicable

File name

Package_2_for_kb2957979~31bf3856ad364e35~x86~~6.2.1.0.mum

File version

Not Applicable

File size

1,795

Date (UTC)

06-Apr-2014

Time (UTC)

18:06

Platform

Not Applicable

File name

Package_3_for_kb2957979~31bf3856ad364e35~x86~~6.2.1.0.mum

File version

Not Applicable

File size

3,179

Date (UTC)

06-Apr-2014

Time (UTC)

18:06

Platform

Not Applicable

File name

Package_4_for_kb2957979~31bf3856ad364e35~x86~~6.2.1.0.mum

File version

Not Applicable

File size

1,812

Date (UTC)

06-Apr-2014

Time (UTC)

18:06

Platform

Not Applicable

File name

Package_5_for_kb2957979~31bf3856ad364e35~x86~~6.2.1.0.mum

File version

Not Applicable

File size

1,830

Date (UTC)

06-Apr-2014

Time (UTC)

18:06

Platform

Not Applicable

File name

Package_6_for_kb2957979~31bf3856ad364e35~x86~~6.2.1.0.mum

File version

Not Applicable

File size

1,823

Date (UTC)

06-Apr-2014

Time (UTC)

18:06

Platform

Not Applicable

File name

Package_for_kb2957979_rtm~31bf3856ad364e35~x86~~6.2.1.0.mum

File version

Not Applicable

File size

3,860

Date (UTC)

06-Apr-2014

Time (UTC)

18:06

Platform

Not Applicable

File name

X86_3b6531107d38e39f82ac895af736c9c4_31bf3856ad364e35_6.2.9200.21007_none_faefaaa987162924.manifest

File version

Not Applicable

File size

696

Date (UTC)

06-Apr-2014

Time (UTC)

18:06

Platform

Not Applicable

File name

X86_4cd7063ec005a3ebbf575f996ce28319_31bf3856ad364e35_6.2.9200.21007_none_6372ceeb28cbdb27.manifest

File version

Not Applicable

File size

700

Date (UTC)

06-Apr-2014

Time (UTC)

18:06

Platform

Not Applicable

File name

X86_d452fda6bf4e75138512a3b13c84ef62_31bf3856ad364e35_6.2.9200.21007_none_7fdf112dcfacdc3d.manifest

File version

Not Applicable

File size

719

Date (UTC)

06-Apr-2014

Time (UTC)

18:06

Platform

Not Applicable

File name

X86_microsoft-windows-d..wmanager-compositor_31bf3856ad364e35_6.2.9200.21007_none_03105d81299ee48a.manifest

File version

Not Applicable

File size

116,655

Date (UTC)

05-Apr-2014

Time (UTC)

04:39

Platform

Not Applicable

File name

X86_microsoft-windows-directx-dxgi_31bf3856ad364e35_6.2.9200.21007_none_380c82dd08cdafd5.manifest

File version

Not Applicable

File size

90,010

Date (UTC)

05-Apr-2014

Time (UTC)

04:39

Platform

Not Applicable

File name

X86_microsoft-windows-lddmcore_31bf3856ad364e35_6.2.9200.21007_none_a956a328cdcdbb89.manifest

File version

Not Applicable

File size

283,125

Date (UTC)

06-Apr-2014

Time (UTC)

18:06

Platform

Not Applicable

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

File name

Amd64_4cd7063ec005a3ebbf575f996ce28319_31bf3856ad364e35_6.2.9200.21007_none_bf916a6ee1294c5d.manifest

File version

Not Applicable

File size

702

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

Amd64_511dddaf565353f8514aeef5112f0d39_31bf3856ad364e35_6.2.9200.21007_none_cc045a2249441cb1.manifest

File version

Not Applicable

File size

1,048

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

Amd64_5522c8fe922a16778cdef764bcba1573_31bf3856ad364e35_6.2.9200.21007_none_4f29b0df5156aa5a.manifest

File version

Not Applicable

File size

700

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

Amd64_5f08b5533fef08b4a3a7dcc2306afe29_31bf3856ad364e35_6.2.9200.21007_none_516f5530ee67b320.manifest

File version

Not Applicable

File size

1,086

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

Amd64_fdd8423515409380c2f9b813998f76cf_31bf3856ad364e35_6.2.9200.21007_none_677d24a07c8f98c8.manifest

File version

Not Applicable

File size

704

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

Amd64_microsoft-windows-d..wmanager-compositor_31bf3856ad364e35_6.2.9200.21007_none_5f2ef904e1fc55c0.manifest

File version

Not Applicable

File size

116,659

Date (UTC)

05-Apr-2014

Time (UTC)

07:14

Platform

Not Applicable

File name

Amd64_microsoft-windows-directx-dxgi_31bf3856ad364e35_6.2.9200.21007_none_942b1e60c12b210b.manifest

File version

Not Applicable

File size

90,012

Date (UTC)

05-Apr-2014

Time (UTC)

07:15

Platform

Not Applicable

File name

Amd64_microsoft-windows-lddmcore_31bf3856ad364e35_6.2.9200.21007_none_05753eac862b2cbf.manifest

File version

Not Applicable

File size

283,129

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

Package_1_for_kb2957979~31bf3856ad364e35~amd64~~6.2.1.0.mum

File version

Not Applicable

File size

1,822

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

Package_2_for_kb2957979~31bf3856ad364e35~amd64~~6.2.1.0.mum

File version

Not Applicable

File size

1,805

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

Package_3_for_kb2957979~31bf3856ad364e35~amd64~~6.2.1.0.mum

File version

Not Applicable

File size

2,483

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

Package_4_for_kb2957979~31bf3856ad364e35~amd64~~6.2.1.0.mum

File version

Not Applicable

File size

2,284

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

Package_5_for_kb2957979~31bf3856ad364e35~amd64~~6.2.1.0.mum

File version

Not Applicable

File size

2,282

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

Package_6_for_kb2957979~31bf3856ad364e35~amd64~~6.2.1.0.mum

File version

Not Applicable

File size

2,319

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

Package_7_for_kb2957979~31bf3856ad364e35~amd64~~6.2.1.0.mum

File version

Not Applicable

File size

2,040

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

Package_8_for_kb2957979~31bf3856ad364e35~amd64~~6.2.1.0.mum

File version

Not Applicable

File size

2,077

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

Package_9_for_kb2957979~31bf3856ad364e35~amd64~~6.2.1.0.mum

File version

Not Applicable

File size

1,833

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

Package_for_kb2957979_rtm~31bf3856ad364e35~amd64~~6.2.1.0.mum

File version

Not Applicable

File size

5,827

Date (UTC)

06-Apr-2014

Time (UTC)

18:28

Platform

Not Applicable

File name

X86_microsoft-windows-d..wmanager-compositor_31bf3856ad364e35_6.2.9200.21007_none_03105d81299ee48a.manifest

File version

Not Applicable

File size

116,655

Date (UTC)

05-Apr-2014

Time (UTC)

04:39

Platform

Not Applicable

File name

X86_microsoft-windows-directx-dxgi_31bf3856ad364e35_6.2.9200.21007_none_380c82dd08cdafd5.manifest

File version

Not Applicable

File size

90,010

Date (UTC)

05-Apr-2014

Time (UTC)

04:39

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

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

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

Thank you for your feedback!

Thank you for your feedback! It sounds like it might be helpful to connect you to one of our Office support agents.

×