Download Cumulative Security Update for ActiveX Killbits for Windows Vista for x64-based Systems (KB953839) from Official Microsoft Download Center

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Cumulative Security Update for ActiveX Killbits for Windows Vista for x64-based Systems (KB953839)

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Security issues have been identified in Active X controls that could allow an attacker to compromise a system running Microsoft Internet Explorer and gain control over it. You can help protect your computer by installing this update from Microsoft.