In the past, I don't remember the forum, they talked about the fan of a certain brand computer that made a loud noise even when it was brand new. Some of them added a new fan inside for cooling and disabled the fan that came with the computer. They couldn't disable it by disconnectiong it, so they broke the blades off. If I find it I will post back. What computer do you have?
Some proprietary computers have a small dust system for the heatsink fan, perhaps there is vibration or the fan is just touching the duct. Could be the case itself, try holding the sides, front and top to see if this cures it.
My P4 heatsink fan was terribly loud so I replaced it with a MaxOrb heatsink with a 120mm fan. I had to trim the cooling fins where it fouled on the power supply but I now enjoy peace.
klaa2
cboy
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