Exit Code: 6, Exit Code: 7 Installation Errors - http://helpx.adobe.com/creative-suite/kb/errors-exit-code-6-exit.html
Troubleshoot with install logs | CS5, CS5.5, CS6 -
http://helpx.adobe.com/creative-suite/kb/troubleshoot-install-logs-cs5-cs5.html
for information on how to review your installation logs
Closing Programs Interfering with Installation
PC - Task Manager: (CTRL-ALT-Delete) http://support.microsoft.com/kb/323527
Mac - Activity Monitor: http://osxdaily.com/2010/08/15/mac-task-manager/