virus question

[Merry Jolkar]

Thanks! If a ship has master computer + br/ls/cw, and it is raided by marines, is it taken over, or does the ship computer overide the raiders?

And, what is the advantage of the Master Computer level III? From what I read in the FAQ, it takes less virus damage to destroy it than MC II (and MC is the hardest to kill with a virus).

Finally, just checking: a starbase with a MC (and no crew) can never be taken over, right?

Thanks!
Merry