Currently, by the time I am posting this stuff SQL Server 2008 is in CTP. And off course, it has several installation issues. For the very first time, when I sit for the installation of SQL Server 2008 Express believe me I run the setup up to four times. So let me share with you, you must need to have the following items installed on your system.

• Windows Installer 4.5 Redistributed
• .net Framework 3.5 SP 1 or .net Framework 3.5 SP 1 (Full Download)
• Power Shell 1.0

Without installing the above component, We cannot Install SQL Server 2008.