I have an Acer Aspire 5670 laptop with Windows XP.

After four years, suddenly the trackpad is not working anymore.

I connected an external mouse and tried to reinstall it, but, by mistake, it seems that I erased the program. How do I reinstall the internal mouse?

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I assumed that by "internal mouse", you meant a trackpad. Is that right? – slhck Dec 10 '11 at 17:16
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