Haha yeah wasn't sure how intense the impact driver would be. I wanted to even use a hammer to knock in the screwdriver more into the screw, but it is only a fragile window :sAAAAA NOOOOOOO!!!!
an impact driver is for auto and industrial use not for home use or used on wood. the impact will break the entire window apart not to mention the glass. they make easy out bits for your common battery op drill/ driver. one side will drill a pilot and the other is left hand thread to grab the screw.