It seems that there is a password reset batch file located in the Tools folder.
Navigate on your local drive to the installation path of your Symantec Endpoint Protection. Locate the Tools folder.
Look through the batch files that are listed, finding the resetpass.bat file.
Execute the file.
Logon to the management console with Username: admin Password: admin
Reset your password right away.
Create a secondary administrator account.
If this doesn't work you may need to uninstall then reinstall the product to create a new admin account and password.
Regards.