Windows 7 Beta is a public beta of Windows 7. It was released to the public in early January and to MSDN and Technet subscribers a few days earlier. Microsoft originally said that they would allow 2.5 million people to download this beta, but due to high demand, unlimited downloads were available until February 10, 2009.
This version of Windows 7 expired on August 1, 2009. After this date, users had to uninstall the beta; otherwise, it would go into reduced functionality mode.