Problemas con Ubuntu 7.04 al instalar

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Buenas... tengo un serio problema con la instalacion del ubuntu nuevo; lo descargue de donde dice la pag (la edicion de 64 bits) y todo va bien hasta q empieza a cargarse un monton de cosas y a la final la pantalla me queda asi:

Loading, Please wait...
User not known to the underlying authentication module
User not known to the underlying authentication module
User not known to the underlying authentication module
User not known to the underlying authentication module
User not known to the underlying authentication module
User not known to the underlying authentication module
User not known to the underlying authentication module
User not known to the underlying authentication module
User not known to the underlying authentication module
User not known to the underlying authentication module

Kernel alive
kernel direct mapping tables up to 100000000 @ 8000-d000

PD: mi procesador es un AMD 64 "Venice" 3200+ @ 2ghz y mi memoria ram es de 1gb; y aunque dice "please wait" creo q he esperado mas de 5 minutos y no hay ninguna actividad

erdanblo

Prueba con la de 32 bits.

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