When installing ArtiosCAD 12.1.1, the first part of installation is installing SQL Express 2012. If .NET Framework 3.5 is not activated in the Windows Features, SQL installation will fail.
Often, activating the feature .NET Framework 3.5 will fail as well.
Most documentation indicates that the Windows installation media will be needed to correct this issue.
Related article with the solution using Windows media:
This article explains how to activate .NET Framework 3.5 WITHOUT having the Windows installation media.
Standard Windows 8, Windows 8.1, or Windows Server 2012 does not have .NET Framework 3.5 activated.
Trying to enable it via Control Panel > Turn Windows features on or off > Download files from Windows Update might fail as well.
You may wish to revert these settings after the ArtiosCAD installation is completed depending on your network configuration.
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