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    Windows 7 - Error Code: 66a (Can't install KB2160841)

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      Windows 7 - Error Code: 66a (Can't install KB2160841)

      Applies To: Windows | Windows 7 | Windows Update

      Getting error code 66A Windows update encountered an unknown error. Security Update for .NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008, Windows Server 2008 R2 for x64-based Systems (KB2160841)

      Installation date: ‎10/‎17/‎2010 2:14 PM

      Installation status: Failed

      Error details: Code 66A

      Update type: Important

      A security issue has been identified that could allow an attacker to compromise your Windows-based system that is running the Microsoft .NET Framework and gain complete control over it. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer.

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      had same problem,for a week,go to control panel click uninstall programs,find >Net framework 4 client profile file ,then click right and do repair file ,install part worked fine right after
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    • View Answer at http://answers.microsoft.com/en-us/windows/forum/windows_7-windows_update/windows-7-error-code-66a-cant-install-kb2160841/11b6b2c5-e780-4343-9de5-ffa4619f45c4
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