One can 'Google' to see the function of the rogue process( ***.exe )and it is usaully associated with some programme.
I notice that the anti virus programmes can be paticularly troublesome from time to time and seem to trash the disk e.g. AVG can get upset if it fails to get thru to server. I had to re-instal on one occasion after an update. Had even worst problems with McFee, . Firefox use to hog memory at one time but this seems to be fixed.
It can be an idea to take a snapshot (use printscreen key & paste into Word) of your processes when everything is running well and use to compare when things are unwell, so rogue processes can be identified . Every process should be capable of been accounted for.
I have seen cases where the processes cant be ended as they automatically restart but at least this method has worked for me as it always pointed me in the right direction and I was always aware as to where the trouble lay.