Windows SmartScreen is a reputation based protection, more details on Microsoft website.
Note: This only applies to Merging Technologies products. For other installers and programs, please consult the manufacturer documentation.
SmartScreen can't be reached right now
This message indicates that the Microsoft database cannot be reached, most probably because you are not connected to the internet.
If the Publisher is Merging Technologies and you have downloaded the installer from the Merging Technologies official website, you can click on run to proceed with the installation.