"I'll see about taking the generators offline. It should pull her in to check long enough for you to get to the others." And if their host manages to destroy Cortana's body in the process...eh, she'll manage. Nice and roomy in the base systems, even if she doesn't like the decor.

She can't find a pure software weakness--hardly unexpected--but sometimes you just have to hit it with a rock. Usually she has the Chief for all her mayhem-causing needs, but hey, she's resourceful, and also now has a detailed schematic from the newly-unsecured network. And a pistol.

Cortana traces the lines that are supplying power to the ventilation fans between the team and their targets and sends her body jogging towards that tower. She's humming as she starts putting high-velocity rounds into important junctions...and suppressing the emergency flags that would alert anyone to the fact this is happening. Eventually there'll be nowhere for the generators to send their power. With any luck, that'll earn her some pretty explosions, but she'll settle for an overload and orderly shutdown. Can't always get what you want and all that.