I run windows 7 and my laptop does not want to start up, and if I try to go into recovery mode it starts to beep. If I leave it for a few minutes it starts off with the gigabyte logo then goes to a black screen with a blinking white line in the top left corner, after another few minutes it goes to a screen which asks me to choose a operating system and the only option is windows 7, I click enter and then it doesn't want to boot. pls help me!