Enviro Spase requires ArcGIS Version 10.0 or newer running on a Windows computer with a sufficient Processor/HD/Memory/Display & OS sufficient to run ArcGIS. For more specific information see What are the hardware requirements to run Enviro Data?
An ArcGIS Pro version of Enviro Spase is currently under development and beta testing. Please contact us for more
When I try to install Enviro Spase I get the error shown below.

Newer versions of Windows do not include aversion of .NET, that is backwards compatible with .NET 3.5. As a result they will not work with Enviro Spase. To correct this, click No and then go to Download .NET Framework 3.5. . Once on that page, download and install the version needed by clicking on the link for Download .NET Framework 3.5 SP1 Runtime.Once downloaded, you will need to install it.
If you still have problems, please contact