I have noticed that for all these 10 months using NIS/NS it constantly spams different errors in logs. Can not say about NIS, and it is retired version anyway, but NS 2015 spam this errors too.
So, from the error log we can see that NS is trying to check some random (?) files at some drive partition. Occurs once a day, random time (or may be not, may be it counts from Windows start, or else). http://i.imgur.com/bqyuGFE.jpg
But - this partition does not even exist, this file does not exist too (I had never downloaded or copied such files, of course).
Does NS have reason behind such actions? Anyone has the same? Looks creepy.