How long can I test Windows 7?



This is a very important question, because Windows 7 Beta and Windows 7
RC each have an expiration date. To avoid interruption, you’ll need to
rebuild your test machine using a valid version of Windows before the
software expires. Windows will notify you that the expiration process
is beginning and two weeks later your PC will begin shutting down every
two hours. The Beta expires on August 1, 2009, and bi-hourly shutdowns will begin July 1, 2009.
The RC will expire June 1, 2010, and the bi-hourly shutdowns will begin on March 1, 2010.
In both cases, you’ll need to rebuild your test PC to replace the OS
and reinstall all your programs and data. (Learn more about installing Windows.)

Ahora para los apurones y en español se resume mas o menos así:

"La beta expira el 1 de agosto del 2009 y luego se apagara el sistema cada 2 horas continuamente."

Cool  , asi que ojo!

{1} http://www.microsoft.com/windows/windows-7/faq.aspx

{2} No recomiendo instalar este o ningun sistema de MS, dirigirse a www.ubuntu.com,
    www.debian.org para descargar un sistema operativo de verdad