Portable: Ubuntu - Run Inside Windows

Before this, if you want to try Ubuntu - for a beginner, you can run it via live CD but now they create the easy way! You just can run the Ubuntu without restart your pc / laptop but this operating system are develop for Windows User only.

here is some review from Lifehacker.com

Built from the same guts as the andLinux system that lets you seamlessly run Linux apps on your Windows desktop, Portable Ubuntu is a stand-alone package that runs a fairly standard (i.e. orange-colored, GNOME-based) version of the popular Ubuntu Linux distribution. It just doesn't bother creating its own desktop, and puts all its windows inside your Windows, er, windows.


The coolest parts about Portable Ubuntu are:

• It actually works (in most cases, on most systems).
  
• It fits on a (larger) thumb drive and can run entirely from it.
  
• It can work on, and save to, your Windows folders and files.
  
• It's persistent, so changes you make and apps you install are carried around with you.
  
• It's easily manageable from Windows, and works great on dual monitors.
  

It's easy dudes! Feel free to try! Just only 438MB!

[How-to]

1. Open your command prompt as an administrator (hit Windows key, type in cmd, then right-click on the "Command Prompt" option that appears and select "Run as Administrator"); on XP, you'll probably just have to launch a command prompt.

2. Head to the folder where you extracted your Portable Ubuntu, and enter run_portable_ubuntu and hit Enter to launch the .bat script.

Your machine will whir and decompress for a while, and you'll likely get a few prompts to "Unblock" coLinux and a few other apps' abilities on your system. Unblock all of them, and you'll eventually get a small, move-able menu bar on your desktop, as seen in the top screenshot. Drag this wherever it's comfortable to keep it, and you're on your way.

credit to LifeHacker.com

[Related Link]

LifeHacker.com - Portable Ubuntu Runs Ubuntu Inside Windows

Protable Ubuntu - Download