This image is not the one that came with windows. It is of a much higher quality, resolution and size then anything windows could handle and is not of the dimensions needed for most monitors.
Is this the one that comes originally with Windows?
Does anyone know how they were painted?
it is a complicated procedure by starting painting on a dark colour background called "imprimature". It is usually dark brown colour and the actual painting is made only with white paint starting from the light to the dark and then using little amount of paint with more turpentine they put the colour they need. This process continue many times until it start looking like this painting.