Processes sometimes need to keep files open. They could be files that you are viewing or editing, or temporary or system files that the process needs to work properly.
Para ver que ficheiros que ten abertos un proceso:
Busque o proceso na lapela
Prema co botón dereito o proceso e seleccione
In the list of open files that appears, you might find some special files called sockets. These are actually a way for processes to communicate with one another, and are not normal files that you can view or edit.