Norton 360 Prevents Execution of my Game (.exe)

It's up to the user to use an anti-virus that isn't crap...also it's up to Norton to stop making crappy products. I'm not sure what you expect anyone else to do.

I've never used Norton but I assume it has some sort of feature that allows you to set the program exceptions, i.e. programs Norton will not block. Adding Unity to this list might solve your problem. I use avast! anti-virus and I've never had any problems with it.