Complex sentence: The rogue Smith begins to behave like a virus himself, making copy after copy of himself using humans and other programs in the Matrix, all of them with one purpose based on his old Agent programming, which was now corrupted.
Split into simpler sentences: The rogue Smith begins to behave like a virus himself, making copy after copy of himself using humans and other programs in the Matrix. All of them with one purpose based on his old Agent programming, which was now corrupted.