Today I was trying to install the latest management tools for SQL Server using SQL Server Express 2008 R2 on a Windows 7 machine with Visual Studio 2010 running the setup up file I got the follow error message:
System.Configuration.ConfigurationErrorsException: An error occurred creating the configuration section handler for userSettings/Microsoft.SqlServer.Configuration.LandingPage.Properties.Settings: Could not load file or assembly 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The system cannot find the file specified.
Solution: surprisingly easy just press Continue!
Edward Wilde 