Shortly after the release of the June Public Update, we received notification of a potential issue affecting a subset of Office 2013 Click-to-Run users. In some cases, users running Office 2013 may not be able to launch Office products after the June Public updates are installed. We have since corrected the issue by releasing updated Click-to-Run build 15.0.4623.1003.

For users who have encountered this, the following Microsoft Answers post (http://answers.microsoft.com/en-us/office/forum/office_2013_release-office_install/i-cannot-open-any-office-programs-after-installing/7faab63f-7a27-4138-a834-e72df884fc40?tm=1402703347975&rtAction=1402703371948) describes steps to resolve the issue.