The installed .NET Framework on your computer is too old.

• You can install .NET v3.0 from 
  http://ftp.enlight.net/support/net/dotnetfx_v3.exe
• Or you can download a later .NET Framework Redistributable Package from Microsoft.

Please note that you will need administrator permissions on the computer to install software. If you do not have that you may have to talk to your administrator.

If you are using Windows Vista or later .NET Framework is already included with the Operating System. If you get this error message despite this, it may be because .NET has been disabled. You can then enable it in the Control Panel under the Program section, "Turn Windows features on or off".

Click on this link to view the complete System Requirements document.