Shoutbox

I've installed ubntu on my laptop, and when I did, I resized a partition which doesn't have anything to do with the booting.
Now, if I start my laptop, and choose ubuntu, the loader appears. When it's done loading, it disappears, and nothing happens. The screen is on, but black.
So happens if I try to boot Vista, the loader appears, then disappears, and the screen stays black.

I've tried running the Vista setup, but it doesn't start! And the ubuntu CD won't start either! (However the ubuntu CD gives some errors.)

I need my laptop very soon, so I'd really love if someone could help me.
And no, there are no recovery disks.

Thanks.