If you have office 2007 in your PC, and you want to install SQL Server 2005, you may have the following error:
ERROR 1706 Setup cannot find the required files. Check your connection to the network, or CD ROM! For other potential solutions to this problem, see c:\Program Files\Microsoft Office\Office11\1033\Setup.chm
You must download Office 2003 web components first and then you can install SQL Server 2005 successfully.