mousing over keypad shuts down laptop immeadiately

[-sfm153-]

I use a mouse on the bottom left corner of the laptop and often I'll move it up into the keypad area (around the shift and "2" keys). There's some combination of keys that the mouse must press that shuts the laptop off immediately; by that I mean i might as well have pulled the power cord out with no battery installed. It drops dead instantly. The question is, what key combination is it that's doing that, and, given that information, how do I reassign that key combination so that it won't shut the laptop off? This never happened with my earlier Envy Laptops. This is the laptop with the fingerprint reader between the ALT and left arrow keys just to the right of the spacebar (not below the right side keypad enter key).