The Mangler 2 (2002)

The Mangler 2 is a 2002 horror film, starring Lance Henriksen, about people threatened by a computer.

Plot
Joanne 'Jo' Newton, a girl desperate for attention from her workaholic father, ends up going to an upper class private boarding school after a break in at her dad's computer company. The school is getting ready to install a new security system. Jo and several others students are to remain behind while the others leave for Spring Break, as punishment from the school's Dean, Headmaster Bradeen (Lance Henriksen). However, Jo, with her knowledge of computers, has hacked into the school's mainframe and unleashed a super virus called "Mangler 2.0" in the security system.

Trivia
It has absolutely nothing to do with the other film called The Mangler.