Satellite C850 - Low fan speed after BIOS update

Hello,
So I have my Satellite C850-PSKCEV bios updated around 6 months ago to version 6.80 (I bought my laptop in 2012), and since then the fan is running at low speeds and will never run full speed as before, and as a consequence the laptop overheats prematurely and very fast, and even when the laptop is not in use but left running it does overheat, also gaming is not even possible as any game that I run (even with the lowest settings) gets a fps drop every 5 seconds and lasts 5-10 seconds which renders even the lightest games unplayable, also I am afraid of the continuous overheat to damage the laptop's internal components.
I did clean the fan and vents from dust and there is not even one particle inside them and yet the fan won't run fast and I can't feel but very slight airflow from the vents as apposed to the strong one before this problem.
Laptop model Toshiba Satellite C850-A811 Part No. PSKCEV-00S00FAR
Intel Core i5 2450m - AMD Radeon Hd 7670m
Windows 8.1 64bit

Hi
Have you tried to change cooling method settings and set it to maximum performance?

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