Hotbar displays a dynamic toolbar and targeted pop-up ads based on its monitoring of Web-browsing activity. The toolbar appears in Internet Explorer and Windows Explorer. The toolbar contains buttons that can change depending on the current Web page and keywords on the page. Clicking a button on the toolbar may open an advertiser Web site or paid search site. Hotbar also installs graphical skins for Internet Explorer, Outlook, and Outlook Express. Hotbar may collect user-related information and may silently download and run updates or other code from its servers.