A window in a dream often reflects perspective -- how much you can see of a situation, or how visible you feel to others. A clear window can point to clarity or opportunity coming into view, while one that's broken or blocked may name a fear of being exposed before you're ready.
The dominant star being in the Midheaven, exalted or in its domicile and taking part of the ascendant. - Picatrix (Andalusia, ~1000.AD)