Can Computers add noise to home electrical system

Why not turn your computer off or unplug it.This problem is most noticeable in the high frequencies.Don't forget about the flourescent lights!

Mine adds noise and even physical vibrations. Lately, hard drive doesn't stop rolling and adds even more extra noise...

Yes, mine does too. The easiest way to check is to plug a radio in the same power line and listen to am AM channel while you operate your computer. In my case, statics go louder when I move my mouse. This noise is gone after I turned off the computer. I tried installing both a surge suppressor and a line conditioner, they didn't work.

Actually the thought never occurred to me until I read this E mail from PS Audio. In my house the computer gets non stop action between myself , my wife, and my kids , so shutting it down everytime I want to listen to music will not fly, although certainly for demo purposes its a good thought. Plus my high speed internet comes via Cable so it does have a direct coax tie into my A/V system. I wanted to try it now, but my wife has the washing machine going. Guess advancement in audiophile science will have to wait.