Beginning with version 2015.03, Amazon Linux is released in Intel 64-bit (x86_64) versions.
SSM Agent requires Windows PowerShell 3.0 or later to run certain AWS Systems Manager documents (SSM documents) on Windows Server instances (for example, the legacy AWS-ApplyPatchBaseline document). Verify that your Windows Server instances are running Windows Management Framework 3.0 or later. This framework includes Windows PowerShell.