Thermal Throttling
Step by step guide on replacing the thermal paste on your laptop.
easy description:
There's paste factory installed between your processor and cooler that can wear out after about 1-3 years, causing your pc to run hot and slow down. Replacing it can help your pc run cooler and reach those "new pc speeds". Plus new better paste lasts longer than the factory installed version and conducts better.
technical description:
Factory installed thermal compound has a cure age of about 1-3 years, which means that older paste actually loses thermal conductivity, which in turn can cause thermal throttling. Replacing the cpu paste with high end compound can help increase thermal conductivity between your cpu and heatsink, which in turn can restore the speed capabilities of your processor from when it was new.