I picked up my laptop computer this morning and found that it is suddenly MUCH heavier than it was yesterday. I have never weighed the thing, but the change in weight is VERY noticeable. No conditions in our apartment changed....at least none that can be determined from a reasonably thorough examination. Anyone have any ideas? It's a Dell Inspiron 15, Series 3000....purchased in October, 2014 at Walmart. Seems to be functioning normally, as of right now.