Walkthrough | A Problem of Security Harry Potter Deathly Hallows 2 Guide
Last update: 11 May 2016
The first boss fight. You will have to battle against professor Snape, the current headmaster of Hogwarts. His reign must finally come to an end. First however you will have to deal with Amycus and Alecto Carrow - two Death Eaters standing beside Snape
The fights isn't much different from any other ones, apart from the fact that the enemies are now much more resistant. It doesn't matter who you attack, the health bar is common for both enemies. When Carrows use Protego break their shield and keep attacking. You can use the benches as cover. You can also take a look around the room - two collectibles can be found here.
Eventually Minerva will make an entrance (you will be able to control her). You will also learn a new spell - Expulso. This offensive spell (hold down the mouse button) can cause significant damage, but its power fades away rather quickly. I'd suggest alternating between it and Stupefy. Note that the teacher is very slow and cannot run, but on the other hand uses magic protection. There are also two new collectibles nearby.
The headmaster loves attacking with series of spells. Keep attacking him and breaking through his shields so he doesn't have time for that. Around the middle of the battle he will pick up one of the benches and throw it at you. Start mashing 1 and the item will be returned with a crash. The weakened headmaster will eventually start teleporting, throwing down magic bombs and attacking harder. Keep strafing and don't stop attacking him. The offensive attitude will surely pay off.