I have a very strange problem with my laptop. For some reason when I hit a key near the bottom of the keyboard by mistake (ALT key?) it moves my cursor back about 20 letters so i am then typing into the middle of the previous sentence. It almost always happens right after I type a letter near the bottom of the keyboard. I have never seen this before and don't know what started it. I use Win 7 if that matters. Any ideas how to get rid of this problem?