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Although it is stated in the manual that the fan speed control softkey would give us four different options to choose from, but my Z480 Ideapad Lenovo on Win8 has a different scenario. Once this softkey is pressed, ONLY the dust cleaning is performed. There is no other option to choose from. I am wondering whether this is an issue with Win8 on this model of notebook or it is about the hardware. Thank you

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Features like that often require a software component, in your case that's Lenovo Energy Management for Microsoft Windows 8 (32-bit, 64-bit) - Notebook. Is that piece of software installed?

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