http://blogs.msdn.com/sqlexpress/archive/2009/04/22/troubleshooting-the-corrupt-file-error-when-using-the-sql-server-2008-express-setup-package.aspxI've seen a number of people bringing this message up in the forums recently so I thought I would blog about it rather than type the answer over and over. (I'm lazy that way.) Problem When you run the installer you get the following error after the downloaden-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/sqlexpress/archive/2009/04/22/troubleshooting-the-corrupt-file-error-when-using-the-sql-server-2008-express-setup-package.aspx#9563936Thu, 23 Apr 2009 07:11:26 GMT91d46819-8472-40ad-a661-2c78acb4018c:9563936Troubleshooting the corrupt file error when using the SQL Server 2008 Express Setup Package | Microsoft Share Point<p>PingBack from <a rel="nofollow" target="_new" href="http://microsoft-sharepoint.simplynetdev.com/troubleshooting-the-corrupt-file-error-when-using-the-sql-server-2008-express-setup-package/">http://microsoft-sharepoint.simplynetdev.com/troubleshooting-the-corrupt-file-error-when-using-the-sql-server-2008-express-setup-package/</a></p>