Finally I made f8 work. I switched the hard drive from the laptop who didn't work, and put it in my other laptop, and so I went into control panel, and activated safe mode starter, and out the hard drive back in the laptop who didn't work, and the laptop turned and I made it in to safe mode... Now what??
I tried to look at system restore, but apparently I don't have any restore files.
But now I can go to the normal windows, without safe mode, but sometimes it also turn off and goes crazy...
But if you have suggestion to do something in the normal windows, u can say