All of a sudden three of our workers can't get logged into the admin control panel and I am wondering what might have caused this. We are using ML 8.0.1 and about a couple of days ago one of our workers tried to log in but couldn't. We reset the password (from another employee's login) but she still couldn't get logged in. Then we tried two other employees admin login and they had the same problem.
Only one of the four machines we use allows any admin to log in. We have been up and running for about 2 months with no problem until now.
Any ideas how to fix this? Or what might have caused this? Could it be a virus?