Only been using Windows 7 and IE9 about a month, so still learning the new functions. Occasionally my mouse arrow will change into an icon with four arrows, pointing up, down, left and right. As I move it around the web page will enlarge or shrink to microscopic proportions, although the window stays full size. It's completely hit or miss if I can get the web page back to a readable size, although I found a Microsoft article related to IE8 that says press control+0 to get things back to normal. I don't use a mouse, strictly the touch pad, but have no idea what I'm doing to cause this and have never been able to repeat it. It's purely accidental when it happens and also extremely annoying. Any advice?