When the 2014 Workstation/Client is installed, there is an Excel piece that installs automatically for SIR. If the users don't have rights to run the install, this could be causing the problem. Yet, in the screenshots (more vaguely) we can't tell where the program is trying to install. I have learned that in newer Windows OS, users do not have edit rights by default in the Registry - I believe it is HKEY_USERS. Therefore, if the users don't have rights to either the folder where the program is trying to 'update' or the registry, it could cause this loop. I have also seen Crystal conflicts cause this look with Windows Installer.