Here's a graphical guide for all new users with a Windows background using Ubuntu
Read it here
Having problems installing something on your new Ubuntu operating system? “Where's the EXE?”, “Where do I need to extract this to?”, “How do I run it?”, “Where did it go?” – have you been thinking questions like these? Don't worry, installing software, themes and other things on Ubuntu is actually very easy! This guide will help you understand with screenshots, instructional videos and to-the-point language.