what resolution is your laptop screen and what resolution is your game?

Laptops have a fixed resolution of display elements so in order to approximate a lower resolution, they blur the pixels to prevent them from looking odd and blocky as they try to make a smaller image fit a larger display matrix. Otherwise it would look strange, some pixels would be 2 or 3 pixels wide whereas others might be 4 .. it makes the whole image look tatty... blurring is the better option.

Of course, you could always resize your game's window to be the same as the laptop display.