http://blogs.msdn.com/b/sqlserverfaq/archive/2009/03/18/sql-server-2005-setup-failing-to-install-on-cluster-when-we-use-an-underscore-in-the-virtual-cluster-name.aspxSetup is always known to have a mind of its own; this blog is meant to demystify this process. We are specifically talking about SQL Server 2005 Setup on a cluster. It has been observed that the installation of the SQL server 2005 instance on the clusteren-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/sqlserverfaq/archive/2009/03/18/sql-server-2005-setup-failing-to-install-on-cluster-when-we-use-an-underscore-in-the-virtual-cluster-name.aspx#9487930Wed, 18 Mar 2009 23:30:54 GMT91d46819-8472-40ad-a661-2c78acb4018c:9487930infoblog &raquo; SQL Server 2005 Setup Failing to Install on Cluster when we use an underscore in the virtual cluster name<p>PingBack from <a rel="nofollow" target="_new" href="http://blog.a-foton.ru/index.php/2009/03/18/sql-server-2005-setup-failing-to-install-on-cluster-when-we-use-an-underscore-in-the-virtual-cluster-name/">http://blog.a-foton.ru/index.php/2009/03/18/sql-server-2005-setup-failing-to-install-on-cluster-when-we-use-an-underscore-in-the-virtual-cluster-name/</a></p> <img src="http://blogs.msdn.com/aggbug.aspx?PostID=9487930" width="1" height="1">