My operating system is Vista. When I try to close a page or file the screen jumps around. I have to follow the close icon each time to its new location and click a number of times. This occurs randomly, sometimes it behaves, other times it jumps repeatedly until I very gently click on the very edge of the "close" icon. Don't know if this technique is relevant to the problem, but it seems to be a pattern.
screen jump, close button,