How did the Dumbledore in movies 1 and 2 from Harry Potter die?

Dumbledore doesn't die in the first two Harry Potter movies. He's alive and well, serving as Headmaster of Hogwarts throughout both films.

* Harry Potter and the Sorcerer's Stone (2001): Dumbledore is an active character in this movie, guiding Harry through his first year at Hogwarts.

* Harry Potter and the Chamber of Secrets (2002): Dumbledore continues to be an important figure, helping Harry solve the mystery of the Chamber of Secrets.

Dumbledore dies in Harry Potter and the Half-Blood Prince (2009), at the hands of Severus Snape.