Windows 10 has the Quick access folder near the top of the folder pane in the Windows 10 file explorer. Icons in Quick access are only shortcuts. I am aware that the user is unable to delete the icons. I always choose to preform the "permanently delete" from the folder the file is in. If you preform a right click on any file, there is an option to permanently delete the file. This option is placed in the context menu if you have Webroot installed on your windows computer system.
I have not implemented the previous versions feature, so I do not expect this is the reason why. These files that I have permanently deleted are accessible from the Quick access folder in windows 10. I am convinced that webroot does not actually deleting files properly.