The following error can be caused by a blocked file. It may be nessary to unblock the easybox.zip before extracting:
Import-Module : Could not load file or assembly 'file:///<path to easybox directory>\Edc.EasyBox.Installer.dll' or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515) At line:1 char:1 + Import-Module .\Edc.EasyBox.Installer.dll + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: ([Import-Module], FileLoadException + FullyQualifiedErrorId : System.IO.FileLoadException,Microsoft.PowerShell.Commands.ImportModuleCommand
When a file is downloaded from the internet with Internet Explorer, it can be marked as blocked. The Easybox zip file should be unblocked before extraction. The file can be unblocked either through the Properties context menu or using the powershell Unblock-File command.