Afte the Windows Vista dissaster, this time Microsoft didn't make 6 years to release a new Windows version. Windows 7 are available to public since today.
Download the Windows 7 Beta here.
The Windows 7 Beta is going to be available download-only and available for a limited time to the first 2.5 million people who download the beta.
The Windows 7 Beta will be available in English, German, Japanese, Arabic, and Hindi, and each language will be available in 32-bit and 64-bit versions (except Hindi which will only be available in 32-bit). Because the Windows 7 Beta will be offered download-only, it will be provided to you as an ISO image (an .iso file) that you download. After downloading either the 32-bit or 64-bit ISO image of the Windows 7 Beta, you will be required to burn the ISO image to a DVD to install Windows 7. So you want to be sure you have a DVD burner before spending the time downloading the ISO image.
The Windows 7 Beta only supports Windows Vista SP1 to Windows 7 upgrades. So if you intend to do an upgrade – be sure it is on a PC running Windows Vista with Service Pack 1.
In case you need a serial for Windows 7 Beta go here to get one:
https://www.microsoft.com/betaexperience/productkeys/win7-32/enus/default.aspx
or
https://profile.microsoft.com/RegSysProfileCenter/wizard.aspx?wizid=83bcfb21-ef4f-4282-9059-ceac11a44f5a&lcid=1033
But it might require you to log in with you MSN or Hotmail account.
More about Windows 7 Beta at Windows Team Blog, Technet forums and Springboard.