help..my lap top won't start up.. when I turn it on it comes up and asks if I want to start normally.. when I tried that it comes up with the windows screen saying it's loading then flashes a blue screen for a second then shuts off and comes back to asking if I want to start normally again, I've tried to open is safe mode and to go back to last working time nothing works always goes back to same thing and just recycles over and over