Office 2013 Not Opening

So if I click on any office icon on my Windows 8.1 PC my cursor turns into the "loading" circle then stops and I receive absolutely no response. It doesn't matter if it is word, powerpoint, excel, nothing works. Luckily my essay that I was working on was automatically backed up to Skydrive so I can work on it using skydrive but I was wondering if anybody else has had this issue and how to fix it. I'm currently running repair but it doesn't seem to be doing anything. Any help would be appreciated.