Hi IT.Procurement,
Which OS are you using? Have you created a 32 bit or a 64 bit package? Is it a 32 or a 64 bit machine? Are you logged as an admin on this machine? Do you have any previous version of Adobe software installed on this machine? Please attach the Pdapp.log.
Logs: http://helpx.adobe.com/creative-suite/kb/troubleshoot-install-logs-cs5 -cs5.html.
Regards,
Romit Sinha
