Windows Vista Beta 2 doesn't start

[Guest]

I have upgraded Windows XP to Vista Beta 2 x86. All worked fine. But after 2
days, vista didn't want to start anymore. It hangs-up in the boot screen with
the grey loading bar, which is moving. I can wait hours but nothing happen,
although the bar is still moving.

The problem is that i can't boot from the DVD to install RC1 because it
hangs-up with a black screen. So i have to make Vista work again, but how?

I have an ASUS A7N8X-E deluxe and 1 gb ram in dualchannel. I have already
tried to remove one of the sticks, but that didn't change anything.

graphic: MSI FX 5900 XT
hdd: 160 gb samsung. 110 gb ntfs, 15 gb fat32, 35 gb linux

hope you can help me

 

[William]

Try pressing F8 during boot up to get the options and then Use Last
Known Good Configuration.

William

 

[Guest]

Already did, but didn't help. thanks anyway.