I can open the launcher and everything works fine there. But whenever I reintstall or click play (for any mod pack ex. jurassic or crazycraft) it will open a java file but nothing happens and it closes after a couple seconds. A java icon appears on my task bar then disappears after a couple seconds. In the upper left corner, the current task will read net.minecraft.launchwrapper.launch and disappears when the java icon does. My Java is up to date (Java 8 update 45) and my RAM has anywhere...
Won't Launch Anything
Won't Launch Anything