I am not finding the exact answer that if deadlock occurres in the system then the system will stop working or some of the processes which are not involved in the deadlock can keep executing.
When deadlock occures Then system will go in deadlock or only that processes which are in deadlock?
Only that processes which are in deadlock will.
And it's one of the reasons that most of modern personal computers ignore it.
(Since deadlock prevention,avoidance,detection and recovery are expensive)