Harry Potter for Kinect

This is the final achievement in Year 1. To get it, you'll have to deflect keys and defeat Quirrell. When you face the keys, don't try to swat them away! I found that 9 times out of 10 when I did so the game wouldn't register it and I got hit anyway. Instead, move your hand to where the key is coming in from and block it. Once you've completed three rounds of this, you'll face off against Quirrell. Just like in the Quidditch game, you'll have to place your hands on his face for a set amount of time for the game to register it but don't worry, if you deflected the keys this is easy enough.

At the end, you'll be graded based on your deflections, your health and how fast you defeated Quirrell. Since the challenge is relatively easy, you should have no problems unlocking it.