kernel_task eating my cpu

[dededa]

Hi there,

 

I've been running 10.8.2 without any problem but today I realized that system works more slowly than usual. I opened activity monitor and find out kernel_task doing constantly around 75% cpu usage. I can work almost as usual but sometimes it just hangs for a few seconds.

 

Is there any solution for this annoying process? I have no idea ._.

 

Thank you for eventually advices.