Installing : Installing System Architect : Installing System Architect : Problems during installation
  
Problems during installation
The following are known problems or suggestions for troubleshooting errors received while installing System Architect.
Installation of Microsoft .NET Framework 3.5
For Windows 8 and Windows 2012, an error may occur during the automatic installation of Microsoft .NET Framework 3.5. If you receive this error, it will need to be manually installed. See the Microsoft support site for additional information:
http://support.microsoft.com/kb/2734782