In Windows Server 2003, Microsoft introduced the Internet Explorer Enhanced Security Configuration feature. In many organizations, the first task that admins take is to disable this "feature" as it can very quickly become a hindrance to getting work done. To disable the feature, you had to use ASdd/Remove Programs, select Windows Components, and uncheck the Internet Explorer Enhanced Security Configuration checkbox and you were back to a normal browsing experience.
Microsoft has also included this security feature in Windows Server 2008. However, disabling and managing the feature in Windows Server 2008 requires a different process.