You have 60 days to complete the course, or until the clock at the top counts down to zero, whichever comes first. You can't print your certificate until the clock runs to zero. If you try to log back on after the clock has run down to zero you will be locked out. So make sure you print your certificate just as soon as the clock runs out.

  If you leave your computer to go do an inspection, talk on the phone, etc, you have to log out for the clock to stop. If you leave the computer, your computer is not going to know you are not sitting there reviewing the class and you will run out of time.