Microsoft PowerPoint 2010 Viewer Service Pack 2 (SP2) provides the latest updates for PowerPoint 2010 Viewer. This service pack includes two kinds of fixes:
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.
All the public updates that were released through May 2013, and all the cumulative updates that were released through April 2013.