GTA IV Killer is a program designed in VB.NET in order to end the process GTAIV.exe when it has crashed and not give you a pain in the ass. Instructions: After opening the program, Press F1 on your keyboard. Then When GTA IV crashes you can press the END key on your keyboard In order to test this software, when GTA IV is open, Press Alt+Tab and if the software is activated (After F1 press) you may proceed pressing the END key on your keyboard.