Sam lindbloom-airey not entirely, yes you can create a fake player name but you cant testfor that player cause he doesn't exist i haven't tried lately but i assume you still cant use testfor on a fake player so basically all you are doing is storing score and not recalling it. also just to mention this thread is about it not working properly i am not trying to just store scores i am trying to attach it to a entity using the new @e parameter.
Note i have never installed avast on this PC