Why does the mouse pointer jump around the screen?

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you have been talking about why usb style mice jump around but what about the round ones with the green caps my seems to go every where even if im not toughing it i cleaned the ball in it and checked the wire any ideas why it isnt working?

try changing the battery worked for me lol

Please help. My mouse pointer jumps all over my screen. I've done all the suggestions and it won't stop. It randomly clicks and opens my web browser, random photo folders and even my messenger service. I've unplugged it and tried to use the fingerpad on my laptop and it still jumps all over...it never stops. I've asked everyone I know to please assist because its a problem that just started about 2 weeks ago. My mouse is a laser pointer so its not an issue of "dirt" my mouse pad is clean and I don't have any pets. I've disabled and reinstalled my driver and "rolled back" with problems still. Please help, I'll pay anything! Thank you!

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