Vista - Windows Vista Black Screen after login

Hi,
I've this problem and i'm sorry for the bad english, but i'm italian.
I've find the problem in this forum, but i haven't found the solution for me, and now i've open a new thread, and if the moderator or administrator would delete or move this post, for me there aren't problem, the important is "resolve my problem"!

THIS IS THE PROBLEM:
I've black screen after auto-login in vista business. I've Fujitsu Siemens PC with the original license and i've GeForce 8700GT Video Card.
When i arrived to black screen i've the mouse pointer but i can't make nothing (ex. CTRL+ALT+DEL, WIN+R, WIN+E, CTRL+ALT+ESC). I've attend 10 minutes but the screen remaining black. When the vista worke I had disabled "restore point" and so..when i click (in F8 mode) the voice "LAST CONFIGURATION ... " the black screen is always with me
help me please, i'm very desperate!!
PS I've tried to restore vista and i've make CHKSDK, i haven't other idea.

Hi
I have a Vista pc that boots up and runs till just before the Vista logo when it idles to a complete stand still on a black screen.
The desktop is fairly simple in its components with nothing fancy other than MB, CPU, RAM and HDD. I cant even access safe mode and restore points have never been set.
I have tried several ideas that I have read off the net but nothing works.

Help please and thank you in advance.

Gideon