I'm trying to install a Windows 10 guest on VirtualBox with a Ubuntu 15.10 host. I was sold a USB Stick with Windows 10 and then found that VirtualBox can't install from a USB Stick. I downloaded a Windows 10 iso from the Microsoft site.
I start to create the Guest and get to the point VB is asking for the optical virtual device and get
Failed to open the disk image file /home/roye/Downloads/Win10_1511_English_x64.iso.
Could not get the storage format of the medium '/home/roye/Downloads/Win10_1511_English_x64.iso' (VERR_NOT_SUPPORTED).
Result Code: VBOX_E_IPRT_ERROR (0x80BB0005)
Component: MediumWrap
Interface: IMedium {4afe423b-43e0-e9d0-82e8-ceb307940dda}
Callee: IVirtualBox {0169423f-46b4-cde9-91af-1e9d5b6cd945}
Callee RC: VBOX_E_OBJECT_NOT_FOUND (0x80BB0001)
Any ideas or pointers to a good tutorial on how to do this?