.NET Framework Versions in Registryhttp://developers.de/blogs/damir_dobric/archive/2008/07/08/net-framework-versions-in-registry.aspx.NET 1.0: Software\\Microsoft\\.NETFramework\\Policy\\v1.0 .NET 1.0: SP1 Software\\Microsoft\\Active Setup\\Installed Components\\{78705f0d-e8db-4b2d-8193-982bdda15ecd} .NET 1.0: SP2 Software\\Microsoft\\Active Setup\\Installed Components\\{FDC11A6F-17D1enCommunityServer 2008 SP1 (Build: 30619.63)