Have been using Live Mail for years with no problem.  Upgraded to Win 10 July 31 and email was working fine.  Received an email the other day and couldn't delete it. Bad sector on drive??  I suspect something was updating (Windows, **** I don't read?) and it caused a problem.  I rebooted and was able to delete ok. Fine until I checked email today and have the same problem again.  What folder needs to be copied, eliminated, and recreated??  Is there a folder repair for Live Email??