As part of Microsoft’s routine monthly security update cycle, 7 new security updates were released on December 11, 2012. If you happen to perform a manual update of the latest security updates then I suggest visiting Microsoft’s Safety & Security Centre at the link below and reviewing each and every update available for download. For instance, a critical update for Microsoft Office 2007 and 2012 is highly recommended to fox a vulnerability that could allow an attacker to execute code remotely if a user opens a specially crafted RTF file using an affected version of Microsoft word!
Read more here – http://www.microsoft.com/en-gb/security/pc-security/bulletins/201212.aspx