Continuity mistake: In their first scene, Andy's mom wants him to go out some. She waves the phone at him holding it in two different ways (index on the top right corner or at the middle of the right side). (00:07:20)
Continuity mistake: On top of the ladder, the Xmas lights wrapped around Shane change between shots repeatedly. (00:38:00)
Answer: The employee's bosses overworked and abused him. He was depressed, had emotional issues, and probably felt his life was hopeless. Before committing suicide, he wanted retaliation against the company for making him so miserable, so he disabled the safety protocols on the "Buddi" doll's computer chip. Mostly, it's a convenient plot point to explain how Chucky came about.
raywest ★