A family of Microsoft word processing software products for creating web, email, and print documents.
See the Article “Why can’t I start my Office 2013 application at:
If that does not help, then you might remove all traces of the Office installation by downloading the fixit from the following article:
http://support.microsoft.com/kb/2739501
saving it to your computer and then running it.
Then reinstall Office by logging into www.office.com/myaccountwith your registered email address and click Install Office.