- Plan ahead. Back up your files and settings before installing this preview.
- Upon installation, Windows will prompt you to activate. A product key is not required for this software.
- In order to use Windows 10 Enterprise Insider Preview, 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.
Windows 10 Enterprise Insider Preview is not supported on Windows RT devices.For 64-bit installations of Windows 10 Enterprise Insider Preview, 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 Enterprise Insider Preview 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 Enterprise Insider Preview Forums. source : microsoft.com