This morning, running "top", I noticed a process I nave never seen before in my Ubuntu 18.04 laptop Called "MainThread" , it was periodically using a lot of CPU . There was also an entry called "Privileged Cont" I recently installed nordvpn, but nordvpn support said the process is not theirs. Is this a new part of the operating system? is it malware. It has never appeared in "top" on my laptop before, as far as I know.