Can I see your code?
It seems as though you're not updating the window... are you are calling window.display();
at the end of the frame?
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What video card do you have? If it's an Intel GMA card, they are known to be bad at rendering opengl.
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That doesn't look like a 200x200 window.
Also isn't 200x200 too tiny on Windows? Try a 500x500 one.
(If you press the X button, does the window go down?)