luabys;3900247 said:
Try to run this tool
http://blogs.msdn.com/b/astebner/archive/2008/10/13/8999004.aspx
it checks for .NET to be installed properly
CM 16 is designed for .NET Framework 4, normally more recent .NET Frameworks (4.5 4.6) are back compatible but not always. Another possibility is to also install .NET Framework 4. You can have more than one in your PC.