I bought a Microsoft Basic Optical Mouse. My mouse cursor jumps to a different location when I am using it. As I move the cursor to a spot it is suddenly at the upper left corner. Now, for some unknown reason, this new mouse will occasionally act a little funny. It seems to be while surfing and using Outlook Express. I've had to shut down the PC a couple of times today because I totally lost control of what was going on. This just started yesterday. Any ideas?