For some reason, there is about a 2x3 inch area in the bottom left of my screen that I can't click on. For example, if I'm in MS Word, and I try to click on a word that's in that area, nothing happens. Or if I'm using some program and some button is in that area, I can't click on it. Or if I'm in my browser and a link is in that area, nothing happens when I click on it. Basically, that little area of space on my screen won't "read" clicks when the mouse pointer is in it. Any ideas why this could be?