I have the same problem and tried the resetpass.bat after stoping the Manager service and it's not working. Any other solution, a registry hack maybe?
That really shouldn't be the case unless you are trying too hard.
The account gets locked after 3 unsuccessful login attempts and stays like that for 30 mins.
If that's the case, wait and do the resetpass.bat, Once that is complete:
Username : admin
Password : admin
You will be Prompted for changing the password once this is done.
De facto when AV does something, it starts jumping up and down, waving its arms, and shouting...
"Hey! I found a virus! Look at me! I'm soooo goooood!"