Download Ubuntu GNOME 15.10 and install on VirtualBox.
Insert Guest Additions CD Image to improve display resolution.
Create shared folder between guest Ubuntu GNOME 15.10 and host Windows 10.
To share folder, setup Shared Folder in VirtualBox Setting of the guest, assign a machine folder in host. Then run the command in guest Ubuntu Linux
$ sudo mount -t vboxsf vbShare mntShare
vbShare is the shared folder in host, and assigned as Shared Folder in VirtualBox Setting of the guest.
mntShare is the folder in guest Ubuntu Linux.
Starting with version 4.0, VirtualBox can mount shared folders automatically. This post show how to create share folder between host Windows (D:\vbShare) and guest Ubuntu Linux (/media/sf_vbShare), and add current user to the vboxsf group.