Do you know what good pcs or laptops are?

Lately I've been looking for a laptop or pc that costs a maximum of 500 euro…

can you help me maybe?

It always depends on what "good" should mean.

As a rule, it always depends on what requirements you have for a notebook or a PC.

Far too little information… What do you want to do with it, what do you expect, are you aware that you can't get anything really good for 500 euro?