Miscellaneous laptop discussions forum: Laptop fan speeds up while doing nothing

by: ninanikolova March 15, 2013 9:20 AM PDT

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Laptop fan speeds up while doing nothing

by ninanikolova - 3/15/13 9:20 AM

The problem is my laptop's fan is speeding up for no reason. I've noticed this about a month ago and it had never happened before that moment. The laptop is 2 years old.

Most of the time this is what happens: I leave my laptop for a minute or two and go to another room. Then when I come back, the fan (cooling system) is working on maximum speed. The moment I move the mouse or press a key from the keyboard - it magically slows down and eventually gets back to normal speed until I leave it again. Then if I leave it again - it starts doing it again.
All I know is that it's not caused by a rise in the temperature (my room isn't very warm); it's not caused by a heavy software (since it happens while I'm doing absolutely nothing) and it's not because of dust blocking either (because it happens only in specific circumstances).

Today I've made some testing and figured out this only happens if the internet is on. I closed all programs, left the internet on and waited to see what would happen, while I was timing with my phone's stopwatch. In about 2 minutes the fan would go crazy and the CPU metter gadget on my desktop would show 100%. Then when I move the cursor, it would stop. Next time I would do the same thing, this time with the internet off. Nothing would happen. I've done the test again a couple of times and the result was the same. (I also tried doing it while observing the processes, but it wouldn't speed up with the Task Manager open.)

I tried to remember if I'd installed something new and all I remembered was a video game. I tried to uninstall it but I couldn't so I deleted the folder instead. I did a full scan with Malwarebytes Anti-Malware and deleted a detected executable file, but nothing changed. Also I've had other problems since I began using wireless internet (two or three months ago).

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