start vista reboots loop

Hi,
I've done many research without being able to find an answer :
I've downloaded the latest Beta 2 release and install a clean version on a new partition. All when smoothly, but at the end when all is done, I can't start Vista : The PC boot correctly, I have the Windows logo on the screen with the horizontal bar bellow, then black screen and the PC reboot automaticaly. Trying to start in safe mode don't change anything.
My config is : Athlon X2 4400+ Chipset nForce 4 CGU : geForce 7900 RAM : 1Go
Any idea to help me ?
Thanks in advance. Cyriaque

Sorry for th emultiposts.... I had encountered an eror, but the message has been sent... :-(
"Cyriaque" wrote:

Hi,
I've done many research without being able to find an answer :
I've downloaded the latest Beta 2 release and install a clean version on a new partition. All when smoothly, but at the end when all is done, I can't start Vista : The PC boot correctly, I have the Windows logo on the screen with the horizontal bar bellow, then black screen and the PC reboot automaticaly. Trying to start in safe mode don't change anything.
My config is : Athlon X2 4400+ Chipset nForce 4 CGU : geForce 7900 RAM : 1Go
Any idea to help me ?
Thanks in advance. Cyriaque