Windows 7: Black Screen Before Login, even in safe mode

Hi, i have a Gateway Laptop NV7915au, the thing is that i have Windows 7 Home Premium and Ubuntu Installed, i used normally until i got the next inconvinience.

I boot my laptop, i select that i want to use windows 7, instead of Ubuntu.

something like this...

Then when it boots, it ask me for a password with a utility that i normally use that is part from the Windows 7 Manager, i have no screenshot of it, but it just ask for a pasword before login



After this part the screen just stay black, the hd reads for a while and the white cursor remain in the screen, i just pressed W+R, CTRL+ALT+DEL, but nothing works

somehing like this...

the computer normally would continue to something like this, but nothing happen.


I just have tried, botting in safe mode, repairing the startup, but can log still.

Thanks in advance.