How to I change the root foldername that shown in Nautilus
Go to system settings, under system click Details, then click Overview on the left and were it says Device name you can edit what is shown for the root drive under Nautilus. This will change the hostname to Computer also after reboot so just change your hostname to what you want it to be using gksudo gedit /etc/hostname and gksudo gedit /etc/hosts. After reboot Nautilus will show the drive as Computer and your hostname will be whatever you have set it to be, you can check this by just typing hostname in terminal.