Let's assume that we have just installed Linux on our machine, and we want to edit the Grub Bootloader to set MS Windows as the DEFAULT operating system.!! '''NOTE:''' You should first make a <u>backup copy</u> of the bootloader file prior to making any editing changes. We will show you this in the step below !! STEPS: * Boot up into your Linux system. * Open a command prompt (called a ''Linux shell'') by selecting APPLICATIONS -> ACCESSORIES -> TERMINAL * In the terminal, issue the command: '''sudo su''' (this will give administrator priviledges - assuming your have these priviledges, enter your account password) * Issue the command: '''cp /boot/grub/menu.lst /boot/grub/menu.bk''' (just making a backup copy...) * Issue the command: gedit /boot/grub/menu.lst