Elendil's Sword and Sauron's Ring

Originally Posted by Boromir88

Mansun, that's most likely because Sauron was already overthrown and defeated when Isildur used Narsil to cut the ring from his finger.

I'm not sure about that - there is no direct evidence. Mordor was overthrown, but not Sauron, as he still had the Ring on and so was still in power. The most logical answer was that Sauron was still barely vulnerable even with the Ring, and Isildur hit a lucky blow with Narsil probably which caught Sauron by suprise, knocking the Ring off (and then the finger) away from the Darklord.

Just for the record, nobody 'killed' Sauron, they only temporarily destoyed him in the physical form. And if the WK or Gandalf were struck with Narsil, who can say that anything would have happened?