A jumping cursor or mouse on your Dell E6400 laptop computer is caused by sensitive mouse settings. A jumping mouse can become problematic when trying to access data on your computer. Because the mouse will jump across the screen due to high sensitivity, selecting files and applications will be a tedious task. You can reset this sensitivity with just a few clicks of the mouse. You do not need administrative privileges to change the mouse settings on your system.
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Click the "Start" button and then click "Control Panel."
Click the "Hardware" option and then click "Mouse."
Click on the slider to reduce the mouse sensitivity.
Click the "OK" button to complete the change.
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