Put down the drill, and step away from the window.
No drilling should be required. Simply raise the window sash way up to nearly vertical, and it will fall on your head. Installation is the reverse of removal. If it's a big window, you may need a helper to hold the window while you tap the center of the hinge up into the window frame with a rubber mallet.
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Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
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