The pointer can "freeze" and get jerky movements if the system gets very busy doing "windows" things in the background (for example indexing).
When it does get bad, is the hard disk activity light on all or most of the time?
OnePlus 5 review
Best of the Grad Shows 2017: UAL Central Saint Martins
MacBook Pro 15-inch (2017) review
Comment connecter un MacBook à une TV ?