Problems with mouse double clicking on a single click.?

I've changed the mouse so I know it's not just a faulty mouse. For some reason, when I single click, majority of the time it will double click, if I go to highlight something to copy and paste; it will highlight will im selecting and go right away, sometimes it won't even let me highlight. Could... show more I've changed the mouse so I know it's not just a faulty mouse.

For some reason, when I single click, majority of the time it will double click, if I go to highlight something to copy and paste; it will highlight will im selecting and go right away, sometimes it won't even let me highlight.

Could there be something that has affected this, i.e. spyware, etc?
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