Nearly all computer viruses require an action by a computer user to infect and spread. The key is to educate users not to open e-mail attachments that might carry computer viruses. The key is behavior modification, as education is not sufficient. Effective behavior modification must have a means to reinforce the change and to measure how widespread the change is in a population. The invention is used to reinforce and measure the change in user behavior. The invention sends an e-mail with an attachment to e-mail users and creates a list of all users that open the attachment. The user is sent an e-mail with an attachment that looks similar to attachment that contain computer viruses. If the attachment is opened, an e-mail is sent to a specific e-mail address. This e-mail address collects all of the e-mail from users who have not changed behavior and need additional education or management attention.