Important Note: PowerShell dependency removed - KACE SMA 8.1 release, the Windows Agent no longer requires PowerShell as a core dependency. It can be installed on systems where PowerShell is not present and the core features will be supported.
PowerShell must be present on the system for the agent installer to successfully install the agent. PowerShell is required for the new KONEA technology - used to replace legacy AMP.
For older Windows operating systems such as Windows Server 2003, refer to Microsoft documents on how to install PowerShell - such as: https://blogs.technet.microsoft.com/danstolts/2011/03/how-to-install-powershell-on-windows-server-2003-and-enable-remote-powershell-managementall-servers-should-have-this-done/