Junho
Julho
I would recommend to first try and update your touchpads drivers. This can be done by visiting www.acer.com/worldwide, then select your region, click Support, then Drivers and Manuals. Once there select your device and operating system. You will be provided with the appropriate drivers for your device.
Another suggestion, if you aren't already, please make sure you are only touching the touchpad with one finger as multiple fingers touching or palm touching at the same time can exhibit the issue you are describing as well.
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