I hope that this is in the right section. It may not even be a computer problem since the problem is solved when the computer is relocated, however I could sure use a suggestion on who might have an answer. When I play any music, whether stored on the HD, play a commercial music CD or a home burned CD, at some point about 30 seconds into the music, it takes a 1/2 second long stutter followed by a very short slow-down (much like dragging your finger on a vinyl record as it plays), then the music plays normally for maybe 1 minute or so. The periods between the stuttering is random. Now, I have 6 computers in my office network. This is happening on every PC in the offices. To test the possibilities, I burned a fresh CD and played it on every PC. The stuttering took place as usual, randomly, each time it was played. I took it out to my car and played it. There was no stuttering. I packed up my PC and took it home to my home office. I set it up and played music again. There was no stuttering. Music from the HD, commercial CD and my home-burns all played fine. The only variable here is the electricity. Each PC is plugged into a UPS unit so I suspect the lines are clean coming in. I know electricity can be dirty, but I've talked to two expert electricians and they have both looked at me like I was nuts. They think that this is not an electrical problem. So here I am, in that impossible spot, with a problem that just defies all logic. There must be an answer... Can anyone suggest who might be capable of answering such a problem?