Synopsis runs within the Microsoft .NET Framework, either 1.1 or 2.0. You can obtain the .NET Framework 1.1 from the Microsoft .NET 1.1 download site. You can obtain the .NET Framework 2.0 from the Microsoft .NET 2.0 download site. The .NET Framework must be installed prior to installing Synopsis.
Synopsis also requires that Microsoft DirectX 9.0c be installed on your machine. You can download Microsoft DirectX 9.0c here.
You should check for critical updates for your operating system from Microsoft at the Microsoft update site.