If you are unable to remove a folder, double check if there is content in that folder. Your company's main folder, or folders and sub-folders that contain presentations can not be deleted.
Prior to deleting any folders, be sure all presentations and sub folders have been removed.
If the folders displays "contains presentations" but there are no presentations visible, the folder may contain archived presentations or courses. View this quick tip for more information on how to locate archived presentations.
For more information on managing folders, view this helpful tutorial.