10.10以后不支持UltraISO了有点不方便, 不过要去网上找一些改来改去的方法其实也挺浮云的, 直接按照官网上的方法做就好,
地址http://www.ubuntu.com/download/ubuntu/download
Burn your CD or create a USB drive
Windows
- Insert a USB stick with at least 2GB of free space
- Download the Universal USB Installer
- Click 'Run' when prompted

- If the security dialog appears, confirm by clicking 'Run'

- Read the licence agreement and choose 'I Agree' to continue

- Select Ubuntu Desktop Edition from the dropdown list

- Click 'Browse' and open the downloaded ISO file


- Choose the USB drive and click 'Create'

还有就是u盘刻录好以后请一定注意启动顺序, 再仔细看一看