4 year old computer check that the air vents are clear of dust and fluff.
If so inside will also need cleaning out.
Maybe some of your drivers needing updated.
What security programs have you got and are you connected Via Wireless.
The Evil Within 2 review-in-progress
InVision Studio takes on Adobe XD and Sketch
iPhone X news: Release date, price, new features & specs
Comment transformer un iPhone en borne Wi-Fi ?