strange sound coming from computer?

[Krys]

Sometimes when I use my computer, a strange kind of whirring sound starts to happen. It will go away if I move my computer but im not really sure why its happening or what it is. I've noticed a performance loss since this has happened. Anyone know what it is and how i can fix it?

[GX1_Man]

I would suggest opening the cover and trying to isolate where the sound is coming from.

Someone in the past reported a similar problem, but I think he said his computer "glowed" also.