Drop framerate

Hi, every time i use unreal engine no matter what version i have 120 to 20 fps drop for a while but frequently. it happens all the time, when I do nothing, when I test my project and when I edit the blueprint. I have tried uninstalling it and reinstalling it but nothing changes. When I use it, my processor does not exceed 44% (ryzen 5 3400G), my ram still has 10go of margin (35% of use) and my gpu is around 60% for 52 ° C (RX 590 ). Does anyone have a solution? It is extremely annoying as a problem.

Does it drop for just a second and then come back up again? A lot of people discover this is due to other software running on the PC.

Exactly like you said. I will try with nothing in the background.

It don’t change anything. Still lagging

Sorry, can’t tell from here…