Thanks, but that's pretty much a standard answer putting all focus on rage at windows without suggesting any useful solution for this specific case. Although it does work if I just wanted to boot some regular windows installation in any partition, this is a virtual disk and it needs some special command line arguments upon boot which doesn't seem possible to do in grub, if it did I would happily use grub. Installing anything Ubuntu based in a second partition after windows without overwriting mbr works perfectly the way I described above but in Debian based systems it fails, I really prefer Debian over Ubuntu.
Seeing it from another view, is there any way to virtualize both Windows and Linux machines and boot them all natively from virtual disk files of any format on any type of file system as well as inside each other using a hyper-visor like hyper-v, kvm, xen or similar?
Last edited by Kalle.suomi1337; 10-24-2015 at 01:13 PM.
Reason: Extended question and information