Malicious web site feature of malwarebytes doesn't activate, it is best to uninstall the software and then reinstall it. This problem may occur sometimes if there are errors in installation. Malwarebytes Customer Service should ensure that there are no errors while installing malwarebytes. more then info :- http://www.antivirustechnicalhelp.com/blog/help-in-installing-the-norton-antivirus-software/