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Microsoft has released the Windows 10 Technical Preview Download



Note: This is an early preview. Carefully read the information below before you continue with the download.

Review Windows 10 Technical Preview for Enterprise system requirements
Register, then download and install full-featured software. Trial expires April 15, 2015
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Installation Guidelines

Plan ahead. Back up your files and settings before installing this preview.
While Windows 10 Technical Preview for Enterprise is only available in English, Chinese, and Brazilian Portuguese, the English version can be installed in all markets where Windows is available.
Upon installation, Windows will prompt you to activate. A product key is not required for this software.
In order to use Windows 10 Technical Preview for Enterprise, you must sign in to your PC with a Microsoft account. The option to create a local account will be made available at the time of the final release.

If you decide that you want to install Windows 10 Technical Preview for Enterprise using one of the provided ISO files, you won't be able to uninstall it. In addition, after you install Windows 10 Technical Preview for Enterprise, you won't be able to use the recovery partition on your PC to go back to your preview version of Windows. A clean installation of your former operating system will be required, and you will need to re-install all of your programs and data.

Things to Know

Windows 10 Technical Preview for Enterprise is prerelease software that may be substantially modified before it's commercially released. It is designed for IT professionals interested in trying out the next version of Windows on behalf of their organizations. Microsoft makes no warranties, express or implied, with respect to the information provided here. Some product features and functionality may require additional hardware or software. We do not recommend that you install this preview if you are not an IT professional or not professionally managing corporate PCs or devices. We also do not recommend that you install this preview on your primary home or business PC.

Windows 10 Technical Preview for Enterprise should work with the same devices and programs that work with Windows 8.1. In some cases, a device or program might not work or may require an update, or you might need to uninstall some programs and then reinstall them after installing the preview.

Windows 10 Technical Preview for Enterprise is not supported on Windows RT devices.

For 64-bit installations of Windows 10 Technical Preview for Enterprise, a small number of older PCs will be blocked from installing the preview because they don't support CMPXCHG16b, PrefetchW, and LAHF/SAHF.

To use touch, you need a tablet or monitor that supports multitouch.

To access the Windows Store, and to download and run apps, you need an active internet connection, a screen resolution of at least 1024 x 768, and a Microsoft account.

Downloading Windows 10 Technical Preview for Enterprise could take a few hours. The exact time will depend on your provider, bandwidth, and traffic (ISP fees may apply). For technical questions, please visit the Windows 10 Technical Preview for Enterprise Forums.
  Windows 10 Technical Preview Download