I have 2 operating systems installed. But I want the operating system that boots, to be dependant on whether there is a usb flash drive inserted or not.
If a flash drive is not inserted - boot Windows 7. If a flash drive is inserted - boot Ubuntu.
Both OS are already installed on hard disk. I have some ideas about this, I understand that I could have GRUB on stick and that it should have higher boot priority (in bios) than usual harddisk mbr, but I don't have skills nor enough knowledge to make that happen.
Is that even possible?