FYI, you don't even need to run it, maybe once, but bf4 doesn't even need to be open because:
As proprieties of the "cheat engine.exe", I have:
Created: 08/21/2013
Modified: 06/28/2013
ACESSED: 08/21/2013
If i'm not wrong, not even beta was launched.
BTW, yes, it still installed, yes, not used since then.
From cheat engine website:
"Cheat Engine is an open source tool designed to help you with modifying single player games running under window so you can make them harder or easier depending on your preference(e.g: Find that 100hp is too easy, try playing a game with a max of 1 HP), but also contains other usefull tools to help debugging games and even normal applications."
Well, yes, I did use it for debugging my dads application, so what?(and flash games, because as you know bf4 wasn't out yet)