Well deep breath - unlike windows no software can have installed itself and run without your giving it permission so you need to think back, maybe the Netgear installer did it (extremely odd behaviour for legit software to change the boot drive name), or maybe it was something else you downloaded and ran.
All you need to do to stay safe on a Mac is practice safe computing habits - especially regarding letting software install and run.
It isn't likely to be the drive failing, if it was failing to the extent the drive name was corrupted you would have other issues - and not a terminal window open.
There will likely be a terminal log file you can look at but I'm not familiar enough to point you to it I'm afraid...