Don't worry same situation you are in, I am using Extreme injector 2.1 and done all the things you have in windows 8 64 bit. It just seems like the Prototype hack doesn't work on windows 8 64 bit and try using PerX on it too. I recommend you use this hack https://www.mpgh.net/forum/164-combat...patchable.html but try the things you tried on prototype for this.