-- Protected mode Web browsing -- The Vista version of IE7 prevents any Web application from accessing anything but a small protected area where IE7 runs in isolation.

-- Antiphishing in IE7 and Windows Mail (Outlook Express) -- Built-in visual warnings tell users about Web sites that may be trying to trick them into revealing personal data.

-- Outbound and inbound Windows Firewall

-- New standard user account functionality -- makes it easier to give up logging in as an administrator all the time.

-- Automatic creation of a nonadministrator account with computer administrator privileges.