When I leave my computer I lock my account (win+L), and sometimes go to bed without turning it off. I have noticed on a few occasions now that when I arrive back at my pc, the CPU fan's are whirring louder than normal. The temps had been at 60c, when normally they are at 40c. After signing in, I check task manager, and there's nothing there that using the CPU, and after a few minutes the temps drop and life is good again.
What could this be? Does anyone had any good ideas to track whatever it is down? I doubt it's malware because I'm 'web-wise', but I'll run a scan anyway. I feel that Windows is doing something and hiding it from me.