I believe running the following commands should fix the issue.
First, press CTRL + T to open a terminal window.
Next, type the following command in the terminal, press enter, type in your password when you are asked to do so and then press enter again.
sudo apt-get update
Then, do the same for the next command and type Y and press enter to accept the changes so long as it doesn't mention removing anything:
sudo apt-get install lm-sensors tp-smapi-dkms tpb
Finally, run the following command and follow the given on screen instructions (type yes and then press enter to accept each of the prompts):
sudo sensors-detect
You may need to reboot for the changes to take effect and you should also have more accurate hardware temperature readings as a side result.