Do the specs of your machine match with the hardware requirements?
More information: Requirements for Orbit Desktop
Enlarge the amount of allocated memory of your software installation, if possible for your machine.
More information: Orbit Desktop Startup Configurations
Make sure there are no other processes running on the machine while optimizing the images. Use the Task Manager tab and start the tasks when you leave the office.
More information: Task Manager
Use the scripts that are available in the installation of the Content Manager software.
More information: Scripting