I struggled with this ridiculous issue for longer than any aging, jaded Windoze veteran ought to have! Given that we are referring to a Laptop/Notebook computer with a touchpad, I believe I can give you a functional work-around if you, as did I, found that the solution proferred by 'Suebutler' was not doing the trick. If Sue's solution works in your case, use it, as it is a true solution and not a work-around.
That beind said, this is the procedure which worked for me:
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1.) Open 'Control Panel'.
2.) Click on 'Mouse' which should open the 'Mouse Properties' window.
3.) Click on the 'Device Settings' tab which should be on the far right.
4.) Highlight your touchpad device and click on the 'Settings' button, again on the far right.
5.) This should open a window called 'Properties for Synaptics Touchpad' or something similar.
6.) On the left side of the window find and highlight the option called 'Tapping'.
7.) Clear the checkbox labelled 'Enable Tapping' and press 'Apply' or 'Okay'.
8.) Hopefully celebrate the end of chaotic opening, activating and cursor leaping!
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As I mentioned previously, this is a work-around, not a fix. The problem is that in eliminating the undesireable behaviour, we also eliminate a useful touchpad function, namely, tapping. Let's hope Microsoft will proffer a true fix to this harrying problem.
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I sure hope this helps someone.
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p.s. (Thank you to Suebutler for the completely counter-intuitive option!)