http://blogs.msdn.com/heaths/archive/2009/05/29/detecting-visual-studio-2008-service-pack-1.aspxThe Visual Studio 2008 RTM and SP1 detection keys are largely the same as the Visual Studio 2005 SP1 detection keys , and are documented below. But there is a caveat for released and upcoming versions: the shared detection value can be overwritten byen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/heaths/archive/2009/05/29/detecting-visual-studio-2008-service-pack-1.aspx#9724886Wed, 10 Jun 2009 22:50:40 GMT91d46819-8472-40ad-a661-2c78acb4018c:9724886Ion Todirel<p>Nice little tip, thanks! I wanted to search for Visual Studio 10/2010 entries in the installed updates list and check for something that looks like a &quot;SP&quot;, this is much better.</p> <p>-Ion</p>