Microsoft Office 2010 SP1 release:

Microsoft Office 2010 Service Pack 1 (SP1) provides the latest updates for Office 2010. This service pack includes two main categories of fixes:

  • Previously unreleased fixes that were made specifically for this service pack. In addition to general product fixes, these fixes include improvements in stability, performance, and in security.
  • All the public updates that were released through June 2011, and all the cumulative updates that were released through April 2011

How to obtain? You can obtain the service pack and install via two methods:

1) Using Microsoft Update
2) Download it manually (32-bit/64-bit):
The following files are available for download from the Microsoft Download Center:

DownloadDownload the Microsoft Office 2010 Service Pack 1 64-bit package now. DownloadDownload the Microsoft Office 2010 Service Pack 1 32-bit package now

Download list of issues that the service pack fixes:You can download lists the issues that are fixed by this service pack.

Known issues and behavior changes: You can have a look at KB article 2532126 which lists known issues that you may experience when you install the Microsoft Office 2010 Service Pack 1 and Microsoft SharePoint 2010 Service Pack 1.