Window Won't Scroll To Bottom

I am trying to deselect an item in adobe_reader...edit. preferences. internet. display pdf in browser but the window doesn't scroll to the bottom where presumably the ok button is. I deselect display, close the window, reopen the window, and display. is reselected. I can't grab the window title bar and move to the bottom either because the window is already against the top of the screen and I can't seem to resize the window and get to the bottom that way. This problem has occurred in other windows from time to time also.
The people at my bank tell me I need to deselect this item for me to be able to access my account statements, which are presently not accessible, presumably because of this problem with "display pdf in browser".