Welcome to the forum
Please tell us some basic info about what you're playing on—eg make & model of your laptop. Of particular interest are:
Exact make & model of your Power Supply;
Motherboard;
Case & cooling parts;
Graphics card;
Monitor model & Hz;
Resolution you're running at;
What graphic settings level have you enabled?
Are all drivers & BIOS up to date?
Have you tried the simple step of uninstalling and reinstalling the game?