A:AnswerAs long as your computer has an audio/headphones port, it should work fine. Just plug the audio jack into the port, and the power plug into a 110 socket, and you're good to go.
A:AnswerIf your OS won't recognize the audio driver you're using, it doesn't matter what speakers you attach. I'd get either the RealTek or Nvidia drivers and run through that.
A:AnswerYour PC should have an onboard set of sound jacks or else your video card does. Plug the green jack into the green port. Be sure to tell your Settings to play through the speaker jack. Also check your audio driver. If the nvidia driver won't give you sound, swap it to the realtek driver.
A:AnswerI would not guarantee it. You'd be better off getting speakers that are designed to work with sound systems rather than computers just to be sure.