Installed the Ubuntu 14.04.1 on the Dell Inspiron 1420, now this computer had installed three OS, Windows Vista, RHEL7, Ubuntu 14.04.1,  generated the USB bootable drive to installed the system by using the software Rufus. I installed the server version amd64, why not desktop, will explain it in next entry.

the Ubuntu 14.04.1 installation will automatically detect other systems installed on the computer, and will confirm with you about the MBR overwritten during the GRUB2 installation, so after the complete installation, the start up process will be triple bootable  options to select into different three systems.

start up bootable menu

Ubuntu 14.04.1 installed on Dell Inspiron 1420