Levyimage I would recommend reviewing the installation logs to determine the specific error message. You can find details on how to locate and interpret the installation log files at Troubleshoot install issues with log files | CC - http://helpx.adobe.com/creative-cloud/kb/troubleshoot-install-logs-cc.html. You are welcome to post any specific errors you discover to this discussion.
My guess is that you are facing a file permission error. The install log should give an indication of where the file permission failure is located.
