Not to bust your chops sonus but number one isn't a good idea and it's against electrical code. If you have a grounded service with ground wires run to all of your outlets (you can tell because they are three prong receptacles, usually) you should be able to get a ground off of your computer case just loosen a screw on the case if there are any and attach a ring terminal to your ground wire and then put it on the screw. I am not completely sure if the computer will introduce any noise or not but if it does just get an ground strap adapter from radio shack to plug into ground on receptacle and ground to that. I am unsure whether or not you NEED to have the ground for sound purposes but I have heard of it fixing some peoples problems but it is still a good idea to have the turntable grounded anyways.