Norton Suite Recovery

My laptop is running Windows 7.  A critical error developed.  My Norton Security Suite began giving virus alerts at the time this was happening.  The computer became useless.  I reloaded Windows 7.  All the program files, including the Norton Suite were moved into a newly created 'Windows Old' directory.  I can see the Norton files in this directory.  I wish to find a way to launch Norton so that it may be identified and active within the new iteration of Windows 7.  I downloaded the Norton and no longer have the registration key & etc. to do a fresh download.  I really need help on this.  Thanks very much!