My laptop runs extremely slow

[Bloody Doctor]

Hello all. Recently I have noticed that my laptop has been running extremely slow but only when I'm on a web browser. My laptop can run games like minecraft lag free and with a potato like mine, over 60fps. But whenever I play the least demanding 2d flash games, my laptop just runs excruciatingly slow. Like short lag spikes every few seconds, and even these simple amateur 2d games become unplayable. Websites load up extremely slow too, and scrolling down has become a pain as if there is a delay when i try to scroll down. This has only started happening recently.

 

[Vic 40]

Maybe temps get high? Cleaned it out already?