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- Why is my computer fan so loud? 9 answers
When I leave my desktop computer off for a period of time and then turn it on, the fan is very loud (in a way that makes me think something is wrong).
Oddly, if I shut down my computer and then immediately turn it back on again, the fan is quiet and docile. If I only restart the computer (not shut down then press the power button to turn it on) the fan stays very loud.
This problem began less than a week ago - should I be opening up my comp. tower to have a look at the fan? I have no idea why shutting down and turning on again solves it.