1. Download the Ubuntu 12.10 or 12.04 .ISO file.
2. Download Linux Live USB Creator.
3. Format flash drive to FAT32.
4. Open Linux live USB Creator.
4a. Choose your flash drive from the first menu.
4b. Chose the "ISO / IMG / ZIP" Option.
4c. If you did not do step 3, select "Format the key in FAT32".
4d. Click the lighting icon.
5. Turn off your computer.
6. Go into boot options on startup, should say which button to press when it boots up.
7. Select the USB flash drive for boot.
8. Select the "Install alongside Windows" option.
9. When your computer boots, you should be able to select which OS the run in.
10. Select whichever OS your want (Ubuntu 12.xx or Windows 8).