Download Ubuntu 12.04
Ubuntu Linux is a complete desktop Linux operating system, freely available with both community and professional support. The Ubuntu community is built on the ideas enshrined in the Ubuntu Manifesto: that software should be available free of charge, that software tools should be usable by people in their local language and despite any disabilities, and that people should have the freedom to customise and alter their software in whatever way they see fit. "Ubuntu" is an ancient African word, meaning "humanity to others". The Ubuntu Linux distribution brings the spirit of Ubuntu to the software world.
Description:
"The Ubuntu team is very pleased to announce the release of Ubuntu 12.04 LTS (Long-Term Support). Code-named 'Precise Pangolin', 12.04 continues Ubuntu's proud tradition of integrating the latest and greatest open source technologies into a high-quality, easy-to-use Linux distribution. The team has been hard at work through this cycle, introducing a few new features and improving quality control. For PC users, Ubuntu 12.04 supports laptops, desktops, and netbooks with a unified look and feel based on an updated version of the desktop shell called 'Unity', which introduces 'Head-Up Display' search capabilities."
Download:
for x86 Ubuntu-12.04-desktop-i386.iso
for x64 Ubuntu-12.04-desktop-amd64.iso
Installation Guide:
Or check this this step by step installation guide
Source iso files
