The next version of the Windows operating system is scheduled to be commercially released on October 29. However, you can start using it for free, by downloading and installing the Windows 8 Enterprise Evaluation.
You can get both 32-bit and 64-bit versions of Windows 8, in a lot of different languages, including Chinese, English, French, German, Spanish or Japanese.
The installation process is easy: you download a 2 GB ISO file, then use a free tool like the Windows 7 USB/DVD download tool to write this file to a DVD or USB stick. After that you simply insert the DVD or USB stick into a computer, and boot your computer from that device. All you have to do is follow the instructions.