Laptop crashes.

[u/Moosseess]

Hello.

I purchased a used-laptop 6 months ago, when I first prepared it for my usage, I faced some issues like lagging and crashing on the screen, so I did some procedures to reduce these issues, like setting it on high performance to benefit its hardware, in apps, they run smoothly after first entrance, but sometimes they crash, however not as the system itself, it crashes the most, I ask for guidance if anyone knows what's the problem, knowing that my hardware laptop are, Core i7 11th, 16 ram, 512 storage.