How to install .NET 4.0 Client Profile
The Microsoft .NET Framework 4.0 Client Profile provides a subset of features from the .NET Framework 4.0. The Client profile is designed to run client applications and to enable the fastest possible deployment for Windows Presentation Foundation (WPF) and Windows Forms technology. Earlier versions of the .NET Client Profile was only available to XP x86 machines without any .NET Framework installed. With .NET Framework 4.0, supported OS and machine architectures with or without earlier versions of the Framework can install the Client Profile to take advantage of the faster deployment and improved features of .NET Framework 4.0.
To install it, please access the following link to access the Install Instructions section and follow the guidelines outlined there.