My cursur, trackpad, and USB mouse are going crazy

This all happen just today. I don't really have control over the cursur and I have no idea why. The trackpad doesn't really work and the mouse is just jumping around.
Any ideas? or anything I could reset?
This litterally happened over night.....
p.s.
this took about 20 mins to type...

I have this same problem with my MacBook Pro (only since updating to Snow Leopard 10.6.4 from Leopard). I do not use a mouse. Periodically, I will find that I cannot move my cursor or use my trackpad. I usually use 1 finger to move the cursor and when this happens, it takes 2 fingers and it is jumpy (not moving exactly where I want it). Sometimes I cannot select anything or enter won't work.
I originally thought I must have accidentally hit a wrong button when typing. It usually goes away on its own after several minutes and I don't know why or how.
It's as if some setting got changed, but when I went to the trackpad / cursor settings, nothing appears different and I don't see anything to change to put it back the way it was.
Either it is a legitimate glitch with the S/W that needs fixing or some kind of setting issue that has an easier fix than going through safe mode and doing whatever the other poster mentioned.
I am somewhat familiar with safe mode on a Windows machine, but not on my Mac. I am fairly new to the Mac (have had it about 10 months, but still a lot I don't know).
I want an easy fix. It does not appear virus-related (or user-error) as nothing else seems affected and it goes away as suddenly as it came. It is always when I am using the internet, but that is 95% of what I use the Mac for. Again, I never had this problem with Leopard, and I only upgrade to Snow Leopard within the past 2 months or so after months (about 8) of using Leopard with no problem.

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Trackpad or USB mouse wont work

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EDIT:
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Last edited by Foxboron (2013-08-12 09:08:39)

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http://discussions.apple.com/thread.jspa?messageID=8669772&#8669772
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My cursur, trackpad, and USB mouse are going crazy

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