.Net Framework 3.0 (WinFX/NetFX3)

If you have not installed .Net Framework 3.0 your computer yet, click the link below, download the redistributable package and install it.
 
And some information about known issues about netfx3.
 
And also I prefer you to visit these sites for more information about NetFX3.
Next Recommended Reading .NET 3.0 Installation Known Issues