I am running Windows Live Mail 2012 on Windows 7.  Multiple reinstalls of Windows 7 created a hodgepodge of imported folders in the live mail stored messages.  In some folders, multiple unique messages show one message's identical content.  

I have "successfully" repaired Live Essentials.  When I try to force reindexing, I get an error message "folder is in use in another program."  When I tried to make a backup copy of the Live Mail storage folder, I got several "EDB in use" errors.  

From other message board discussions, I know I may have to manually sort the stored messages.  But, seems like I need to get the indexing to work before I take that task on. 

And, so far I cannot.