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My Lenovo laptop used to turn off its fan in Windows 7, this would save a lot of energy and battery would last maybe about 2 times more.
After upgrading to Windows 10 however it never turns off.
I wonder how can I fix it and what is the reason of this problem.
I've tried using dust removal of Lenovo energy management software, it speeds up fan for a while and in Windows 7, I would have silent fans afterwards but it's useless in Windows 10.
UPDATE
It was an Intel Graphic's driver bug and it's fixed now, if you're having this issue you need to update your Windows.
1The fan uses way less energy than the CPU so, if you really were having the laptop run twice as long with the fan switched off, it was because the CPU was put into a low-power mode which meant it didn't need th fan to cool it. So you might want to investigate the power-saving options that Windows 10 provides, rather than just looking for things to do with the fan. – David Richerby – 2015-08-11T08:23:53.930
Thanks for your replay David, yet battery saving was really that much! CPU usage is as always. Can you suggest any particular settings? – Akbari – 2015-08-11T16:48:10.877
No idea, sorry -- I don't use Windows 10 or have a Lenovo. – David Richerby – 2015-08-11T18:30:57.723