She didn't want this.
WOO WOO PORTAL 2 SPOILERS! (Except the game's been out for a while. So...yeah.) I'd imagine the transfer of one's consciousness from a body to a computer would have to be quite excruciating and maddening for a woman as demure as Caroline to try to slaughter everyone present within moments of booting.
I hope GLaDOS looks GLaDOS-y enough here. I wasn't using a ref. Did use one for Caroline, though.
Portal, Portal 2, and all related characters (c) Valve Software