Now you can download Office 2010 SP2 which provides the latest updates for Office 2010. This service pack includes two kinds of fixes: (1) Previously unreleased fixes that are included in this service pack. In addition to general product fixes, these fixes include improvements in stability, performance, and security. (2) All the public updates that were released through May 2013, and all the cumulative updates that were released through April 2013.
Either you can install this via Microsoft Update (recommended one) or download Office 201 SP2 32-bit or Office 201 SP2 64-bit package. For more info you can refer, http://support.microsoft.com/kb/2687455