I am trying to install Ubuntu on the same computer as Windows 7 Home Premium
using VirtualBox. I have come to a message that the new installation is the only
operating system on the computer. This indicates that Windows 7 has not been
detected when it should have been. It offers to install the GRUB boot loader
to the master boot record. It will make Windows unbootable, though apparently
GRUB can be manually configured later to boot it. By an expert, yes, but dare
I continue with this installation? Why has it not detected Windows?