Download Security Update for Commerce Server 2009 RTM (KB2655547) from Official Microsoft Download Center

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Security Update for Commerce Server 2009 RTM (KB2655547)

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A security issue has been identified in the Commerce Server 2009 RTM that could allow an attacker to compromise your system and gain 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.