Pointer is moving alone horizontally

Since the last Lion update the pointer is moving alone from time to time. Mountain Lion installing didn't change anything.
I am sure something wrong in librairy because the disturbance disapear when I restart without extension.
Does someone have an idea to solve the problem because it's not easy to use my laptop without extension.
Regards.
My laptop : MBP 13" 2,4 Ghz late 2010

There are several possible causes for this issue. Take each of the following steps until it's resolved.
1. Follow the instructions in this support article.
2. Open the Bluetooth preference pane in System Preferences and check for unknown or forgotten input devices. Disconnect any USB input devices that you aren't using.
3. Boot in safe mode and test, preferably without launching any third-party applications. If you don't have the problem in safe mode, but it comes back when you reboot as usual, stop here and post your results. If you can't boot in safe mode, do the same. If you booted in safe mode and there was no change, go on to the next step.
4. Reset the System Management Controller.
5. If you're using a Bluetooth trackpad, investigate potential sources of interference, including USB 3 devices.
6. A swollen battery in a MacBook Pro or Air can impinge on the trackpad from below and cause erratic behavior. If you have trouble clicking the trackpad, this is likely the reason. The battery must be replaced without delay.
7. There's a report that a (possibly defective) Thunderbolt Ethernet adapter can cause the built-in trackpad of a MacBook to behave erratically. If you're using such an adapter, disconnect it and test.
8. There's also a report of erratic cursor movements caused by an external display that was connected but not turned on.
9. If none of the above applies, or if you have another reason to think that your computer is being remotely controlled, remove it from the network by turning off Wi-Fi (or your Wi-Fi access point), disconnecting from a Bluetooth network link, and unplugging the Ethernet cable or USB modem, whichever is applicable. If the cursor movements stop at once, you should suspect an intrusion.
10. Make a "Genius" appointment at an Apple Store to have the machine and/or external trackpad tested.

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There are several possible causes for this issue. Please take each of the following steps that you haven't already tried until it's resolved. Some may not apply in your case.
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Wed Nov 27 05:33:26 2013
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Wed Nov 27 05:31:40 2013
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Wed Nov 27 05:31:33 2013
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156
Wed Nov 27 05:31:33 2013
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Wed Nov 27 05:31:33 2013
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158
Wed Nov 27 05:31:28 2013
AP Disassociated. Base Radio MAC:58:bf:ea:0f:fc:20
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Wed Nov 27 05:31:28 2013
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Wed Nov 27 05:31:28 2013
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Wed Nov 27 05:31:17 2013
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Wed Nov 27 05:31:17 2013
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Wed Nov 27 05:31:17 2013
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Wed Nov 27 05:31:15 2013
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Wed Nov 27 05:31:15 2013
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168
Wed Nov 27 05:23:26 2013
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Don´t know at the moment how to handle it.
Regards
Alex

Hi lAlex,
Disable Client MFP under WLAN advanced tab & see if this still occur
Regards
Rasika
**** Pls rate all useful responses *****

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Solved!
Go to Solution.

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Link in case the image doesn't appear http://imgur.com/eyWz9mL
[IMG]http://i.imgur.com/eyWz9mL.jpg?1[/IMG]

CelticsBird wrote:
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Pointer is moving alone horizontally

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