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Save the profile.Any issue posted that is of significant relevance to the issues listed here will be closed without notice and linked to this issue.Name the profile something like "Forge 1.7.10" and select Forge 1.7.10 from the drop down a little further done the profile making page.Open Minecraft launcher and select "New Profile" (bottom left).Activate the installer and select "client".Here is a quick tutorial video I made on installing Forge for Minecraft 1.7.10 How To Install Forge for Minecraft 1.7.10 There is no need to uninstall Minecraft and re-install. Tip 3: Make sure you are running the correct version of Forge. Sometimes this can fix issues with Forge and Minecraft compatibility. Tip 2: Make sure you have launched Minecraft without Forge before trying with Forge. Try following these steps to fix the issue: The issue is simple: : 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 Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release If you REALLY want to run minecraft in this configuration, add the flag -Dfml.ignoreInvalidMinecraftCertificates=true to the 'JVM settings' in your launcher profile. Either you have modified the minecraft jar file (if so run the forge installer again), or you are using a base editing jar that is changing this class (and likely others too). : Technical information: The class should have been associated with the minecraft jar file, and should have returned us a valid, intact minecraft jar location. You will need to fetch a clean version of the minecraft jar file
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: 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 : 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
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: Calling tweak class .launcher.FMLTweaker : Using primary tweak class name .launcher.FMLTweaker
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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.
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