You will need to fetch a clean version of the minecraft jar file : For your safety, FML will not launch minecraft. : The minecraft jar file:/C:/Users/Reisinger/AppData/Roaming/.minecraft/versions/1.7.10-Forge10./1.7.10-Forge10.jar!/net/minecraft/client/ClientBrandRetriever.class appears to be corrupt! There has been CRITICAL TAMPERING WITH MINECRAFT, it is highly unlikely minecraft will work! STOP NOW, get a clean copy and try again! : Found valid fingerprint for Minecraft Forge. : Calling tweak class .CoreModManager$FMLPluginWrapper : Calling tweak class .launcher.FMLInjectionAndSortingTweaker : Loading tweak class name .launcher.FMLDeobfTweaker : Loading tweak class name .launcher.FMLInjectionAndSortingTweaker
#MINECRAFT JAR DOWNLOAD 1.7.10 WINDOWS#
: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_05, running on Windows 7:amd64:6.1, installed at C:\Program Files\Java\jre8 : Calling tweak class .launcher.FMLTweaker : Using primary tweak class name .launcher.FMLTweaker Either my game actually loads and it comes up as a complete black screen not showing my game at all but it says it is running, or it comes up with this error: : Loading tweak class name .launcher.FMLTweaker When I try to run Minecraft with Forge already installed, one of two things happens.