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10 Nov 2012  

Windows 7 Home Premium x64

The fan running is a good thing. They usually run most of the time, except that they're inherently quiet so you don't notice... until something makes them noisy. Often it's a layer of dust on the blades that makes it wobble, enough to create noise. So a good cleaning is always a good idea. If it's a really old laptop and the noise comes back to stay, it's worthwhile to replace it. They're very cheap... the only tedious thing is swapping (especially on those laptops that are complicated to disassemble).
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