imo you should try installing hard drives drivers at first
also you could try running Neverwinter by steam - its much better - all i can tell you - like before without steam on my config it had to load it and check files each time i started it - after - i mean while running by steam it only updates when needed - express start
btw if you have intel cpu it can be the case of hdd drivers - since Neverwinter game uses cpu for various tasks - i would say abnormal or kind of and it reads all the data from hdd that goes through cpu and into ram - so intel storage device manager or smth could be the case - or some intel hdd drivers - ahh its intel rapid i think
also if your computer crashes sometimes - i would say its most probably the case of some drivers - worst and only by chance >>> virus etc