Office 2010 and click-to-run

The latest Office 2010 can be installed in the "Click-to-run" virtualized mode that allows for faster setup and instant update. This mode, however, does not support COM automation and as such cannot be used with XFRX.

More info about the COM automation issues: http://social.msdn.microsoft.com/Forums/en/worddev/thread/e051e92f-5f33-4741-804a-78ceca4cd41e

More info about click-to-run: http://blogs.technet.com/b/office2010/archive/2009/11/06/click-to-run-delivering-office-in-the-21st-century.aspx