The following software prerequisites must be installed on any server running any SQL Server edition:
• Microsoft Internet Explorer 6.0 Service Pack 1 (SP1) or later (required because it is a dependency of SMSS, Books Online, Business Intelligence Development Studio [for Analysis Services], and the Report Designer)
• Windows Installer 4.5 or later (sometimes distributed by Microsoft Windows Update services; also will be installed by the SQL Server Installation Center)
• .NET Framework 3.5 SP1, SQL Server Native Client and SQL Server Setup support files (if not installed already, these are also installed by SQL Server Installation Center)
Table 8.3 lists the software and operating system requirements for SQL Server 2008, ...