The taskbar is three times wider than expected after you change the orientation and the position of multiple monitors in the Display settings of a computer that is running Windows 7 or Windows Server 2008 R2

Symptoms

Assume that you attach multiple monitors to a computer that is running Windows 7 or Windows Server 2008 R2. When you change the orientation and the position of the displays of these monitors in the Display settings item in Control Panel, the taskbar is three times wider than expected. 

For example, you attach two monitors to a computer that is running Windows 7. Then, you perform the following operations in the Display settings item in Control Panel:

  1. You set monitor 1 as the main display, and you display the taskbar at the bottom of the screen.

  2. You set the orientation of the two monitors to "Landscape."

  3. You drag the taskbar to the right side of monitor 1.

  4. You arrange the monitors so that monitor 1 is above monitor 2.

  5. You change the orientation of monitor 1 to "Portrait," and then you drag the taskbar to the right side of the monitor.

  6. You change the orientation of monitor 2 to "Portrait," and then you arrange the monitors so that monitor 2 is to the left side of monitor 1.

  7. You set monitor 2 as the main display.

In this example, the taskbar is three times wider than expected. 

Resolution

Hotfix information

A supported hotfix is available from Microsoft. 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, visit the following Microsoft Web site:

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

There are no prerequisites for applying this hotfix.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global 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 7 and Windows Server 2008 R2 file information notes


Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" 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

    6.1.760
    0.16xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    GDR

    6.1.760
    0.20xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, extremely important 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 for Windows Server 2008 R2 and for Windows 7" 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 7

File name

File version

File size

Date

Time

Platform

Explorer-ppdlic.xrm-ms

Not applicable

3,065

18-Aug-2010

04:35

Not applicable

Explorer.exe

6.1.7600.16658

2,614,784

18-Aug-2010

04:18

x86

Explorer-ppdlic.xrm-ms

Not applicable

3,065

18-Aug-2010

04:43

Not applicable

Explorer.exe

6.1.7600.20783

2,614,784

18-Aug-2010

04:21

x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Explorer-ppdlic.xrm-ms

Not applicable

3,065

18-Aug-2010

05:12

Not applicable

Explorer.exe

6.1.7600.16658

2,870,784

18-Aug-2010

05:01

x64

Explorer-ppdlic.xrm-ms

Not applicable

3,065

18-Aug-2010

05:31

Not applicable

Explorer.exe

6.1.7600.20783

2,870,784

18-Aug-2010

05:13

x64

Explorer.exe

6.1.7600.16658

2,614,784

18-Aug-2010

04:18

x86

Explorer.exe

6.1.7600.20783

2,614,784

18-Aug-2010

04:21

x86

For all supported IA-64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Explorer-ppdlic.xrm-ms

Not applicable

3,065

18-Aug-2010

04:26

Not applicable

Explorer.exe

6.1.7600.16658

4,212,736

18-Aug-2010

04:14

IA-64

Explorer-ppdlic.xrm-ms

Not applicable

3,065

18-Aug-2010

04:37

Not applicable

Explorer.exe

6.1.7600.20783

4,212,736

18-Aug-2010

04:18

IA-64

Explorer.exe

6.1.7600.16658

2,614,784

18-Aug-2010

04:18

x86

Explorer.exe

6.1.7600.20783

2,614,784

18-Aug-2010

04:21

x86

Status

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

More Information

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

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 name

X86_dd02f8bfdc752b14061349654fc2bf01_31bf3856ad364e35_6.1.7600.20783_none_1891bcd3d40373c7.manifest

File version

Not applicable

File size

696

Date (UTC)

18-Aug-2010

Time (UTC)

07:33

Platform

Not applicable

File name

X86_eac8c3c352edfda35cc689627dc52f22_31bf3856ad364e35_6.1.7600.16658_none_99b3a9a0c871e93f.manifest

File version

Not applicable

File size

696

Date (UTC)

18-Aug-2010

Time (UTC)

07:33

Platform

Not applicable

File name

X86_microsoft-windows-explorer_31bf3856ad364e35_6.1.7600.16658_none_51ae7389daf4f3d7.manifest

File version

Not applicable

File size

98,185

Date (UTC)

18-Aug-2010

Time (UTC)

04:47

Platform

Not applicable

File name

X86_microsoft-windows-explorer_31bf3856ad364e35_6.1.7600.20783_none_52129f1ef42f68c1.manifest

File version

Not applicable

File size

98,185

Date (UTC)

18-Aug-2010

Time (UTC)

04:51

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

Amd64_6957607f0f9c355e0d2709817bf7ce4f_31bf3856ad364e35_6.1.7600.16658_none_fcbe634a0b958408.manifest

File version

Not applicable

File size

1,042

Date (UTC)

18-Aug-2010

Time (UTC)

07:33

Platform

Not applicable

File name

Amd64_c5816db4761a40ef2ba41f6bffd15874_31bf3856ad364e35_6.1.7600.20783_none_1470fd022352e0b7.manifest

File version

Not applicable

File size

1,042

Date (UTC)

18-Aug-2010

Time (UTC)

07:33

Platform

Not applicable

File name

Amd64_microsoft-windows-explorer_31bf3856ad364e35_6.1.7600.16658_none_adcd0f0d9352650d.manifest

File version

Not applicable

File size

98,189

Date (UTC)

18-Aug-2010

Time (UTC)

05:41

Platform

Not applicable

File name

Amd64_microsoft-windows-explorer_31bf3856ad364e35_6.1.7600.20783_none_ae313aa2ac8cd9f7.manifest

File version

Not applicable

File size

98,189

Date (UTC)

18-Aug-2010

Time (UTC)

05:49

Platform

Not applicable

File name

Wow64_microsoft-windows-explorer_31bf3856ad364e35_6.1.7600.16658_none_b821b95fc7b32708.manifest

File version

Not applicable

File size

97,119

Date (UTC)

18-Aug-2010

Time (UTC)

04:43

Platform

Not applicable

File name

Wow64_microsoft-windows-explorer_31bf3856ad364e35_6.1.7600.20783_none_b885e4f4e0ed9bf2.manifest

File version

Not applicable

File size

97,119

Date (UTC)

18-Aug-2010

Time (UTC)

04:48

Platform

Not applicable

Additional files for all supported IA-64-based versions of Windows Server 2008 R2

File name

Ia64_01ce49a277a29b04840cbfe2c4ecf0b9_31bf3856ad364e35_6.1.7600.20783_none_09cebda8e10bc60c.manifest

File version

Not applicable

File size

1,040

Date (UTC)

18-Aug-2010

Time (UTC)

07:33

Platform

Not applicable

File name

Ia64_4e3744a0bd063dd7f297e14cf0affc6f_31bf3856ad364e35_6.1.7600.16658_none_1ad1a6f9f8b08bd4.manifest

File version

Not applicable

File size

1,040

Date (UTC)

18-Aug-2010

Time (UTC)

07:33

Platform

Not applicable

File name

Ia64_microsoft-windows-explorer_31bf3856ad364e35_6.1.7600.16658_none_51b0177fdaf2fcd3.manifest

File version

Not applicable

File size

98,187

Date (UTC)

18-Aug-2010

Time (UTC)

05:48

Platform

Not applicable

File name

Ia64_microsoft-windows-explorer_31bf3856ad364e35_6.1.7600.20783_none_52144314f42d71bd.manifest

File version

Not applicable

File size

98,187

Date (UTC)

18-Aug-2010

Time (UTC)

05:42

Platform

Not applicable

File name

Wow64_microsoft-windows-explorer_31bf3856ad364e35_6.1.7600.16658_none_b821b95fc7b32708.manifest

File version

Not applicable

File size

97,119

Date (UTC)

18-Aug-2010

Time (UTC)

04:43

Platform

Not applicable

File name

Wow64_microsoft-windows-explorer_31bf3856ad364e35_6.1.7600.20783_none_b885e4f4e0ed9bf2.manifest

File version

Not applicable

File size

97,119

Date (UTC)

18-Aug-2010

Time (UTC)

04:48

Platform

Not applicable

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