The movie is Chronicles of Riddick.
And yes, he is the leader. They were making a pun.
The meaning was, they were contemplating murdering the Lord Martial. He was a 'half-dead'. For their religion/cult/whatever, once you die you go to the Underworld, which for them isn't exactly like...
Unless a warranty prohibits it, you may want to open up your computer's case and make sure everything is where it should be, not vibrating, etc. If the noise continues, at least verify that it is your hard drive. If it IS your hard drive, then yes, regardless of what tests might be saying, it...