Download Security Update for Microsoft .NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7, and Windows 2008 R2 from Official Microsoft Download Center

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Security Update for Microsoft .NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7, and Windows 2008 R2

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A security issue has been identified that could allow an unauthenticated remote attacker to compromise your system and gain control over it.