Before you proceed with a fix, we suggest you to read this article to understand more about the issue.
Error Code 5-11 Description:
The message indicates that the system cannot find it’s hidden copy of the installation files that are used for repairs and other “good stuff”. Those files may have been “accidentally” deleted by any number of “cleanup” utilities.
Access denied to installation source.
Sorry, we ran into a problem accessing a required file.
Please check that the installation source has the correct permissions, then try again.
The above mentioned messages are some of the results of this Error Code 5-11 information.
Solution For Error Code 5-11 :
The basic troubleshooting to repair Error Code 5-11 is to repair the office program, if it fails we need to uninstall and re-install the program. The necessary steps may be helpful in understanding how to InstallOffice and Uninstall/repair Office programs.
The Normal uninstall is designed with the assumption that you will be re-installing Office. It does not delete everything. It leaves configuration files and also leaves configuration Registry entries. These “carry-overs” may contain corruption that is causing your problem.
NOTE: BEFORE you uninstall, if you have an “Office 2013” bundle make sure you have your 25 character product key. If you have “Office 365”, make sure you can access the MyAccount page.