SpeedyINFIDEL :
I wasn't sure about bios, how would I check the setting? As for the fan, I considered the possibility but have never been in this situation before and thus I'm not sure how to check for that.... Can you expand on those 2 points and I'll check?
Are you asking me to show you a screen, because I don't have one, in fact I never worked on a Lenovo, most of us here have generic knowledge, I know there ought to be a screw there but I cannot tell you what that screw looks like, in your particular car. If you want precise answers you want to go to a Lenovo-specific forum where members will be able to give you more precised answers.
Gist: You push the laptop, cpu and other components heat up, the heatsink removes the heat aided by a variable speed fan(s), the more heat, the fan turns faster (and louder) to remove the heat. On many laptops, there is a BIOS setting (repeat) for Quiet, Standard, Performance (different vendors may use different but similar wordings). The QUIET setting says, simply low Noise (fan) priority hence it delays reeving up the fan, but that also means your laptop will run hotter. To the other extreme, the PERFORMANCE setting says, never mind about noise, turn up fan hard at first sign of heat-up, so computer can continue to run fast WITHOUT THROTTLING.
THROTTLING = This is your computer's last ditch mechanism to guard against heat. It slows down the clock in order to lower temperature (Faster Clock = more heat).
Download a utility that monitor these parameters: Heat, Fan RPM, CPU frequency. I use HWMONITOR for my desktop, I dunno whether it works for laptop. And if you knew what these numbers were when everything was working then you would have a baseline comparison.