How to get rid of unwanted popup

I have had this window popping up for about a month (c:Windows\system32:cmd.exe) its always on startup and it is hard to close. it is a DOS cmd window.  i researched it on Windows and found it is not necessarily a virus BUT it is a nuisance. it can slow things down and maybe cause freezes in games. i have used all of Nortons scan options and it doesn't get picked up. any suggestions on what to do?  thank you

you can disable them in the antivirus under admin settings cant remember wher but it is on on of the points