Symanec Protection Suites

I just migrated to a new iMac from my old one that used OSX 10.4.11 but, when I try to update the virus definitions in Norton Antivirus, I get the message "Norton Antivirus wants to use the "Symantec" keychain. Please enter the keychain password." I had never set a Keychain password for this or any other application. How do I go about opening this application ?

1. 
   
   Open Keychain Access, located in /Applications/Utilities.
2. Choose Edit > Keychain List, then select the keychain you want to delete.
3. Click Delete (-).