Old and outdated browser versions have security issues and don't follow the new web development standards. Update your browser enforces the international movement to eliminate the obsolete browser versions. Outdated browsers such as Internet Explorer 6 (released in 2001) don't follow the web standards, are full of bugs, don't offer the new browser's features like the tabbed navigation or download manager, and have security issues as virus and malware. Browse happy by keeping your browser up to date. It also affects the quality of websites rendering and the web developers waste their time adaptting the website to render finely in these obsolete browsers.