Download Update for Windows 7 for x64-based Systems (KB978637) from Official Microsoft Download Center

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Update for Windows 7 for x64-based Systems (KB978637)

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Install this update to address an issue in which program compatibility settings are ignored and cause applications opened through another 32-bit application to exhibit Windows Vista behavior on Windows 7 x64 or Windows 2008 R2 x64/IA-64.