Computer users are being warned about a growing problem with e-mail messages that takes you to counterfeit Web sites.

They are called phisher sites, and they look legitimate. So does the e-mail, which claims to come from a company you do business with and tells you to click on a link to go to the site and update your personal information.

It’s all a scam, aimed at draining your bank account or stealing your identity.

The Federal Trade Commission said it has just brought a case against the 17-year-old creator of one of the sites, which claimed to be for the AOL Billing Center. Officials said he has agreed to give up ,500 in ill-gotten gains and is now barred from sending e-mail spam for life.