I'm not sure I'm understanding the problem. However, in the Library menu, there is an option to show photos in subfolders. If that option is checked then clicking on the topmost folder will show all the images in the subfolders. If you don't want that behavior, then uncheck that option. If that isn't the problem you are seeing, please describe more fully and possibly include a screenshot.
After downloading LR CC to my new computer running Windows 10 ( from WIN. 7 ) my parent folders and sub folders appear as one which means
Could you explain the steps you followed between downloading and the point where the folder issue happend? Could you explain in a lot more detail? In particular, downloading Lightroom does not cause folders to change. Installing Lightroom does not cause folders to change. So what other steps did you perform here? Did you import photos? Did you move the catalog from the other computer? Please give us the details.
Thank you JimHess, problem solved.
Thank you for getting back, problem now solved, see reply to JimHess.