Download Security Update for Windows Server 2003 64-bit Itanium Edition and Windows XP 64-bit Itanium Edition, Version 2003 (KB896426) from Official Microsoft Download Center

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Security Update for Windows Server 2003 64-bit Itanium Edition and Windows XP 64-bit Itanium Edition, Version 2003 (KB896426)

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A security issue has been identified in the Web Client service that could allow an attacker to compromise your Windows-based system and gain control over it.