Windows Operating System Optimization Tool Guide
OS optimization is very important when you want to use VMware Horizon and deliver virtual desktop machines to your user. As you may know, there is a fling (VMware OS Optimization Tool) that made by VMware engineers and you can use it to optimize your OS automatically.
VMware has published a guide for this tool and you can download it fro this link: VMware Windows Operating System Optimization Tool Guide
I suggest that read the above guide before do any action on your template and deploy machine from that.