Outlook will no longer open after I received a message that it had to close and then got a repair notice.

I was running outlook on my acer tablet in Windows 8 via Office 365.  I got a notice that said that Outlook had run into an unexpected problem and would have to close.  It closed, and then I got a red box notice that said Outlook could self repair locally or on the web (would take longer.)  I chose the local repair.  It then ground away for about 20 minutes, and then the self repair box closed.  After the self repair notice closed, I tried to reopen Outlook, and it would do nothing.  So I rebooted.  Now when I touch the Windows 8 icon for Outlook, I get a message that Outlook is having trouble opening because I cannot run two programs of Outlook at one time.  But nothing is open on my computer.  I have rebooted and still get the same problem.