Use any CD writer software to burn a new ADT CD. Then use this new CD to install the product software. You can also use a third party tool like IsoBuster or Undisker as an ISO extractor if you do not wish to create a new cd.
For more information, go to the link, "Unpacking Your Downloaded CA Products," on the Products Download page at SupportConnect (or search for Document ID TEC342790 in the Knowledge Base). If a CD burner is not available to you, contact your Computer Associates Customer Advocate to place an order for a product CD to be shipped to you.