Fedora 19, Black screen instead of user login screen

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http://forums.fedoraforum.org – Hi everyone, I hope this thread is in the appropieate place, if not I apologize in advance. I'd like to comment you my problem. I installed fedora 19 in a Lenovo z470, since the day it was released, everything was clean, and no problems... but last night when I was about to turn my computer off, I remember there was a new update pending... It was the last thing I did. Today when I turn on my computer, I see the normal boot up menu, with a few kernels to pick up to start, and a rescue item... also the windows one (sorry for that :( ). The thing is that, after I choose the most recent (HowTos)