[fennecbutt]

>Do you use windows

In a desktop the motherboard controls the fans unless you have an alternative like fan control installed, so not windows.

In a laptop it's either still the motherboard, or a specific chip used to manage the fans and other peripherals (ie for Dell/XPS it's locked out of bios control and you need to use Dell's special software to adjust it; Fuck You, Dell!), so still not Windows.

[guappa]

Well a basic windows install will keep the CPU more occupied than a basic linux install, when both are idle.

This reflects in the CPU being hotter, which reflects in the fan spinning more.