Windows 7 is the new release of Microsoft Windows, an operating system produced by Microsoft for use on personal computers, including home and business desktops, laptops, Tablet PCs, netbooks and media center PCs.

Microsoft stated in 2007 they were planning Windows 7 development for a three-year time frame starting after the release of its predecessor, Windows Vista. Microsoft has stated that the final release date would be determined by product quality.

Unlike its predecessor, Windows 7 is intended to be an incremental upgrade from Vista, with the goal of being fully compatible with device drivers, applications, and hardware with which Windows Vista is already compatible. Presentations given by the company in 2008 have focused on multi-touch support, a redesigned Windows Shell with a new taskbar, a home networking system called HomeGroup, and performance improvements. Some applications that have been included with prior releases of Microsoft Windows, most notably Windows Movie Maker, and Windows Photo Gallery, are no longer included with the operating system; they are instead offered separately (free of charge) as part of the Windows Live Essentials suite.

Source
http://en.wikipedia.org/wiki/Windows_7

According to windows7news.com the last day that users would be able to download the O.S. in BETA version would be on February 10th at 12am Pacific Time. Users who start the download prior to that time will have time until February 12th 9am Pacific Time to finish the download. If you have not finished the download of Windows 7 Beta by that time you won’t be able to finish it.

Src
http://windows7news.com/2009/02/10/last-chance-to-download-windows-7-beta/

Although this period is over, many websites have the system available to download as ISO files and as .zips or .rars.

I have already installed the system in my virtual box. Videos of the functionality and features of thist will be posted later.