Windows 10 Technical Preview has 2 update rings. The faster ring is more for those who are eager to test out the new builder with new features. It’s less stable than slow ring which gets updated in a much slower pace. But since anything released from slow ring is more reliable and features ready, it also releases ISO images along with updates through Windows Update. ISO images are perfect for those trying out the new Windows 10 from a fresh installation.
The latest official Windows 10 Technical Preview build is 10074, which happens to be released through slow ring. Therefore, you will get the ISO images with different languages at the same time.
To download, go to this page, scroll the page down a little until you see all download options. Pick up a language you want to use, and click download link for 64-bit or 32-bit edition to start downloading the file.
Once you have the images downloaded, you can start building a bootable USB flash drive for Windows 10 installation media. My favorite tool to build a bootable Windows installation disk is Rufus, a free portable utility that makes creating bootable USB drives much easier.
The build 10074 of Windows 10 looks a lot more like a completed product than previous builds. If you haven’t tried it out, it’s now the time.