My Windows 7 RC expire ... OK ... but where, on line, can I buy and download an official Key for a full windows 7 version .. so I have not to reinstall anyhting ? It would be a very appreciated service

DrLapiano, This has been asked numerous times here. Windows 7 RC cannot be upgraded. You have to do a full, clean install of the final version of Windows 7. More details here[1]. It sucks, but you cannot upgrade the RC with a key or any other way. Links: [1] http://social.technet.microsoft.com/Forums/en-US/w7itproinstall/thread/f95879b0-5e9c-4f7a-82bb-9d1a41cefd4a/Kevin Costain @calwell on Twitter Calwell's Blog Google Profile (Buzz)

There is no direct way to upgrade Windows 7 RC to full version. You can check the following two articles: What should I do if I'm running the Release Candidate (RC) version of Windows 7?http://windows.microsoft.com/en-us/windows7/release-candidate-Windows-7Description of Windows 7 Beta and Windows 7 Release Candidate (RC) expiration dates and functionalityhttp://support.microsoft.com/kb/971767Sean Zhu - MSFT