Microsoft posted a Fixit for last week's Patch Tuesday updates for Office 2013 & 365. Here's a link to the article PC World posted about it. http://www.pcworld.com/article/2363784/patch-tuesday-disaster-breaks-office-2013-for-thousands-heres-how-to-fix-it.html Here's the Fixit link. http://support.microsoft.com/kb/2739501/en-us . Here's link to resign into your account and redownload Office 2013 or 365.https://office.microsoft.com/MyAccount.aspx Follow the links as I posted them.