http://msmvps.com/blogs/officedev/archive/2009/05/05/visual-studio-net-2005-2008-erro-quot-class-not-registered-quot-em-objetos-com.aspxAo executar um projeto C# ou VB, recebi a seguinte mensagem de erro: System.Runtime.InteropServices.COMException was unhandled Message="Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))" Source="System.WindowsenCommunityServer 2008.5 SP2 (Build: 40407.4157)