http://blogs.msdn.com/sqlexpress/archive/2006/07/29/faq-detecting-sql-server-2005-using-wmi.aspxI've gotten a number of e-mails asking how to detect if SQL Express is installed on a computer. I'm finally getting around to putting this in the Blog so I don't have to keep typing the answer. We've made discovery much easier in SQL Server 2005 withen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/sqlexpress/archive/2006/07/29/faq-detecting-sql-server-2005-using-wmi.aspx#682611Sat, 29 Jul 2006 18:38:22 GMT91d46819-8472-40ad-a661-2c78acb4018c:682611Brian KelleyThere is a new post in the SQL Server Express blog which indicates the <br>right way to detect SQL Server...http://blogs.msdn.com/sqlexpress/archive/2006/07/29/faq-detecting-sql-server-2005-using-wmi.aspx#692001Tue, 08 Aug 2006 14:05:27 GMT91d46819-8472-40ad-a661-2c78acb4018c:692001Jens@sqlserver2005.deHi, what about using the ManagmentServer class in the SMO namespace ? Thats probably the easiest way to do it. <br> <br>-Jens. <br> <br>http://blogs.msdn.com/sqlexpress/archive/2006/07/29/faq-detecting-sql-server-2005-using-wmi.aspx#1515774Tue, 23 Jan 2007 20:22:48 GMT91d46819-8472-40ad-a661-2c78acb4018c:1515774GuntherB's WebLog<p>I recently stumbled across this question from a customer : how can you detect if SQL Express is installed</p>