Stability and Reliability Update for Windows 7 and Windows Server 2008 R2 (KB974431)

This update improves the stability and reliability of Windows 7 and of Windows Server 2008 R2 in various scenarios. These issues are
reported by customers who use the Error Reporting service or Microsoft
Customer Support Services. The update resolves the following issues:

  • When you view a PDF file that was created by using
    a 2007 Microsoft Office system document, the PDF file is displayed on
    the screen correctly. However, when the document is printed, some
    characters are missing. This problem occurs in fonts such as Calibri,
    Cambria, Courier New or Gabriola, in which characters such as "fi",
    "ti", "fl", and other combinations are frequently presented as
    ligatures.
  • In certain scenarios, an Emergency alert System
    (EAS) message does not automatically tune to the appropriate channel in
    Windows Media Center.
  • You connect a secondary monitor to a
    computer that is running Windows 7. When the computer resumes from
    hibernation, a black screen is displayed.
  • In certain
    scenarios, the Windows 7 Customer Experience Improvement Program (CEIP)
    diagnostic information settings are configured incorrectly for Windows
    Explorer. Only those users who are enrolled in the Windows 7 CEIP will
    be affected by this part of the update. This update limits the
    diagnostic information that can be collected by the CEIP.
  • You
    put an x86-based computer that does not have Physical Address Extension
    (PAE) enabled into hibernation. However, it does not enter hibernation
    correctly. When you try to resume the computer from hibernation, a
    black screen is displayed. This issue does not affect x64-based or
    Itanium-based computers, or computers that have the Data Execution
    Prevention (DEP) feature enabled.
  • A problem in Windows 7
    affects the playback of certain media files in Windows Media Player,
    when Windows Media Player is started from Internet Explorer. Only those
    users whose media associations were changed incorrectly will be
    affected by this part of the update.
  • On a computer that is
    running Windows 7, you use Windows Internet Explorer to open the
    certificate enrollment Web page and to install an end entity
    certificate. However, the installation fails. This issue occurs if the
    certificate chain for the new certificate cannot be built, or if the
    root certification authority (CA) has not first been installed in the
    Trusted Roots on the computer.

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