Have you updated your BIOS to the latest?
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My laptop also lags when I open armoury crate and fan speed sometimes show 0 rpm.
With the picture you provided, I can see that the fan is working.
If you do find that the fan is not working, I would suggest you bring back your laptop to our service center.
The following is the contact information:
Also you can contact the local service center for help. The following is the contact information: