On behalf of your cryogenically frozen co-astronauts, thank you for attempting to avenge our deaths by shutting down the insane computer HAL. If we were you (and alive) we'd try to remove his memory core. It's that glowing red area we weren't supposed to go into, before that bastard computer killed us. Be careful, when you shut it down it will probably whip out death lasers or something. Not just sing like a little child.
Best of luck, The Dead
PS HAL can read lips. We would have mentioned that, if we were awake.