Severity Rating: Critical - Revision Note: V3.0 (October 13, 2009): Added Microsoft XML Core Services 4.0 (KB954430) when installed on 32-bit and x64-based editions of Windows 7 and on x64-based and Itanium-based editions of Windows Server 2008 R2 as affected software. This is a detection change only; there were no changes to the binaries. Customers who have already successfully installed KB954430