The Windows .NET Framework in Windows is a common source of numerous
problems. This free tool called the .NET Framework Setup Verification Utility
will check if your .NET Framework is working properly. It verifies the
presence of necessary files, directories, registry keys and values for the
.NET Framework. It will also verify that simple applications that use the
.NET Framework can be run correctly. It requires no installation and can be
run from any convenient location. This is a really valuable addition to your
toolkit.
http://www.techsupportalert.com/content/how-make-sure-your-windows-net-framework-set-correctly.htm
