Independence Day (1996)
It's one thing to use dodgy tech nonsense to move the plot on a bit in a movie, but to hinge your whole finale on it? That's what Independence Day did.
We wouldn't blame you for forgetting exactly how those aliens are seen off. A refresher: Jeff Goldblum creates a virus that is uploaded from an Apple Powerbook and takes the whole 15-mile diameter mothership down. Hey presto, all those spacecraft hovering above capital cities fall from the sky. Humanity wins.
How did it work? Well apparently Goldblum's character found out the alien ship's system works in binary code, so then the virus just, sorta, flipped all the 1s into 0s and the 0s into 1s. Take that, alien scumbag. Forget that just about everything else the aliens have is a good, ooh, at least 200 years more advanced than what we have, and that a Powerbook being able to simply hack into a completely, well, alien system is pretty ridiculous.
The laptop didn't even seem to be plugged into anything, for god's sake. Goldblum is returning for Independence Day 2 in 2016, and fingers crossed it won't feature any quite so blatant tech script shortcuts.