http://windows.microsoft.com/ko-kr/windows/preview-iso

자세한건 링크클릭

1. Sign up for the Windows Insider Program, if you haven't already.

2. Read the system requirements.

3. Click one of the Download links on this page to download a special file—it's called an ISO file—that you can use to install the preview.

4. When the download is complete, transfer the ISO file to installation media such as a USB flash drive or DVD.

Double-tap or double-click setup.exe from the installation media, and then follow the steps.   

Product key: NKJFK-GPHP7-G8C3J-P6JXR-HQRJR