Packer.io issues with Windows AMI

I am learning how to use Packer and so far I love the simplicity of the coding. I am able to build an obstacle out, but have a few issues. Firstly, I use an AWS NICE DCV windows base image, and it appears to build it out, but when I try to login, NICE does not work. I can only get in via RDP. It seems like packer is using a base level windows image that strips it of the NICE software.

Is there something I need to do to maintain any drivers or software on a base AMI?