Dell Inspiron 5521 touchpad


Can any one help me with Inspiron 5521 touch pad please. Whenever I open anything like browser, word it takes screen to the bottom of the page and even when I open speaker the volume goes down as well. My primary button was set as 'left' but it keeps changing to 'right'.

Kindly help me out as my day-to-day business is hampering!

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