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Article ID: 976427 - Last Review: October 9, 2014 - Revision: 6.0

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Symptoms

Consider the following scenarios:

Scenario one
  • On a computer that is running Windows 7 or Windows Server 2008 R2, you enable a screen saver.
  • You enable the On resume, display logon screen option for the screen saver.
  • In Power Options, you set the Turn off the display option and the Put the computer to sleep option to the same length of time. Additionally, the length of time that you set is longer than the time that you set for the screen saver to trigger.
  • The time for the Turn off the display value elapses and the display is turned off automatically.
Scenario two
  • On a portable computer that is running Windows 7 or Windows Server 2008 R2, you enable a screen saver.
  • You enable the On resume, display logon screen option for the screen saver.
  • After the screen saver starts, you close the lid of the portable computer.
In both scenarios, the computer is still running. However, you cannot turn on the display by using the keyboard or the mouse. You may be unable to turn on the display until you force the computer to restart.

Note When you set the Turn off the display option to less than 10 minutes, the Turn off the display option automatically changes to the value of the Put the computer to sleep option.

Cause

This problem occurs because of a race condition between the CSRSS thread and the WinLogon thread.

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=support (http://support.microsoft.com/contactus/?ws=support)
Note 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

No prerequisites are required.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

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 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:
    Collapse this tableExpand this table
    VersionProductMilestoneService branch
    6.1.760 0.16xxxWindows 7 and Windows Server 2008 R2RTMGDR
    6.1.760 0.20xxxWindows 7 and Windows Server 2008 R2RTMLDR
  • 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.
Windows 7 or Windows Server 2008 R2, x86-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Winlogon.exe6.1.7600.16440285,69615-Oct-200906:06x86
Winlogon.exe6.1.7600.20548285,69615-Oct-200906:11x86
Windows 7 or Windows Server 2008 R2, x64-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Winlogon.exe6.1.7600.16440389,63215-Oct-200906:44x64
Winlogon.exe6.1.7600.20548389,63215-Oct-200906:43x64
Windows Server 2008 R2, Itanium-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Winlogon.exe6.1.7600.16440786,43215-Oct-200904:56IA-64
Winlogon.exe6.1.7600.20548786,43215-Oct-200905:00IA-64

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  (http://support.microsoft.com/kb/824684/LN/ ) Description of the standard terminology that is used to describe Microsoft software updates

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

Applies to
  • Windows 7 Enterprise
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Professional
  • Windows 7 Starter
  • Windows 7 Ultimate
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 Standard
  • Windows Web Server 2008 R2
Keywords: 
kbmdd kbautohotfix kbexpertiseinter kbsurveynew kbbug kbfix kbHotfixServer kbqfe KB976427
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