Microsoft delivers four security updates that patch four vulnerabilities in Windows. One of the updates was marked “critical,” Microsoft’s most-serious threat ranking. Microsoft did not patch the Windows kernel vulnerability exploited by the Duqu campaign. Microsoft also updated Windows Mail and Windows Meeting Space on Vista, Windows 7 and Server 2008 to fix yet another “DLL load hijacking” vulnerability. Microsoft last week told customers that they could defend their systems by blocking access to “t2embed” library, which handles embedded fonts.”]

