How to delete files?

if i open workstation live and create some file and then just click ‘delete’ will it be possible to restore it somehow after restarting my machine? how do i delete them without restoring them? For exemple i have file password.txt and how to dele it. so it can’t be restored? Is just deleting and shutting down the system enough if it is enabled in the live option

Are all your questions in context of Live Mode?