Why does my cursor jump randomly when I type?

I have just wiped my internal HDD and installed XP SP2 on my HP Compaq nx7300. I'm sure I have no viruses at present. But when I type, very often the cursor jump randomly to another location on the screen. Why? This happens on any website: hotmail, experts exchange etc.
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hermesalphaAsked:
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☠ MASQ ☠Commented:
Sounds like Windows is using its generic drivers rather than specific drivers for your hardware.
Have you installed the Compaq drivers since the reinstallation of Windows?
http://tinyurl.com/25ebgo
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Peter HartCommented:
another angle:
is the mouse the old roller ball type?  these will become jumpy and irratic over time due to the problem is mechnical and takes in dust.  either take it apart and clean or buy an optical mouse.

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Peter HartCommented:
if is a note book then the touch pad is still activve while you are typing and it senses the movement while you type.  try disabling the touch pad and use a mouse
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hermesalphaAuthor Commented:
I installed all HP drivers that were available on the CD-ROM from HP (Hardware enabling drivers), so no driver should be missing.

It's a notebook with a touchpad. Actually, I've got used to the touchpad and prefer it a lot before using a mouse, so I never bought a mouse. But I'm not sure it's the active touchpad that is the problem, because earlier I have not had this problem.
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hermesalphaAuthor Commented:
Thanks Tapanpattanaik,
I think the answer is in your first link. Earlier, I didn't install Synaptics Touchpad Driver and then I didn't have this problem. Now, Synaptics Touchpad Driver is installed and the cursor often has a mind of its own, jumps randomly to anywhere on the screen. I'll try to disable this driver and see if it works.

Anyone has ideas how to disable this driver?
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