Recently when using my mouse, it has started having a very slow jerky motion. Usually it starts after I have been using the computer for awhile, but not always. It doesn't matter if I'm on-line or not, but it does seem worse when I'm connected. My keyboard also does this. I will type, but have a delayed action on the screen, or only half of the letters show up. Does anyone have any ideas or suggestions on this. Thanks in advance for your help.