4c273b0c_uary_2012___Spoon_User_s_Guide__Solution
[Question/Issue] I virtualized and added Outlook 2010 64 bit to my Desktop for use with GroupWise, and now Outlook 2010 will not start. [Solution] 
There is a known issue in GroupWise where it will not work with 64 bit versions of Outlook 2010. The error also occurs when both applications are installed locally.
Spoon Virtual Application Studio FAQ - Spoon Documentation - January 2012 - Spoon User's Guide