Try Microsoft Windows 7 RC For Free
Most recently Microsoft released Windows 7 release candidate and it’s right now available for MSDN and technet subscribers. It’s till on development and soon will introduce exclusive features such as, Remote Internet access to home-based digital media libraries from another Windows 7-based PC outside the home, Utilizing Windows Virtual PC, allows Windows 7 users to run many Windows XP productivity applications, launched right from the Windows 7 desktop, Controlling the computer by touching a touch-enabled screen or monitor is a core Windows 7 user experience.
Before to try you, you should know the requirement of your systems for windows 7. You need 1GHz or faster 32-bit (x86) or 64-bit (x64) processor, 1 GB of RAM (32-bit) / 2 GB of RAM (64-bit), 16 GB of available disk space (32-bit) / 20 GB (64-bit), and DirectX 9 graphics device with Windows Display Driver Model 1.0 and in details you will more details in official site.