this article goes for Symantec avtivirus 10.x which uses SQL desktop engine
for generating report.
If you try more than 5 times to login to admin user, the account is getting blocked.
to open it, follow this procedure:

1. Log on as an administrator on the database server.
2. Execute the following command from a command window:
osql -E
3. On the osql prompt enter the following lines:
use Reporting;
update adminuser set Locked=” where user_name=’the name of the user to be unlocked’;
go
exit