To make Windows boot first, you're going to have to edit your boot loader, LILO or GRUB, the latter being the one Ubuntu uses by default. Open up a terminal and type in sudo nano -w /boot/grub/grub.conf or, if you prefer a GUI to edit it. type in sudo gedit /boot/grub/grub.conf enter your password and note the order of the OS entries. The first OS listed is "0", the second, "1", the third, "2", and so on. then there should be an entry that says "default x", where x is the number of the entry you want to be the default to boot. timeout 30 # This is what you want to change. When set to 1, it