I had a problem opening some of my email messages.  I received the message "windows live mail a problem occurred while trying to open this message".  Per this forum, I ran the procedure to clean the Mail.MsMessageStore file.  After running the procedure, I cannot open mail.  I get the message "Windows live mail could be started etc.  Code (0x800C0155.2).  I then ran the procedure to repair all Windows Essential programs.  I still have the problem.