Windows not loading

I have a samsung N148 plus laptop. Its ram is only of 1 gb and is slow. I takes time to shutdown the pc and sometimes I use to shutdown my laptop holding the power button which force shutdown my laptop and when starts says that not correctly shutted down. Today I did the same but now when I switch my laptop on, it shows 2 options. First : setup repair....second : start normally. And now when I choose any of the two options and let the pc to start....it simply doesn't starts ....it shows the boot scrren of windows and again the two options and does not starts
...it shows a black screen then
Boot screen the two options ......please help me