If you stop em via msconfig Hap, they wont start up ever again (unless you change it or manually call them). If you use FSautostart, you can stop them purely to play the game, then when you finish, drop out of fsautostart, and it'll restart them before it dies.
Upside of fs, you can drop your av, java updates, flash updates, messenger etc and it wont interfere with your game, but will be running if you leave your pc on.
Wurzel