i tryed it and still got an error ,im new so sorry for the bumping i dident know but ty for trying to help
i went here like the farum said http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
i tryed installing windows x86/dident work/so i tryed x64/ still dident work i get this error
[14:27:38] [main/INFO]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[14:27:38] [main/INFO]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[14:27:38] [main/INFO]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
[14:27:38] [main/INFO]: Forge Mod Loader version 7.10.25.1199 for Minecraft 1.7.10 loading
[14:27:38] [main/INFO]: Java is Java HotSpot 64-Bit Server VM, version 1.8.0_20, running on Windows 7:amd64:6.1, installed at C:Program FilesJavajre1.8.0_20
[14:27:40] [main/WARN]: The coremod codechicken.core.launch.CodeChickenCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[14:27:42] [main/WARN]: The coremod vazkii.emotes.client.asm.LoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[14:27:42] [main/WARN]: The coremod codechicken.core.launch.DepLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[14:27:42] [main/WARN]: The coremod invtweaks.forge.asm.FMLPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[14:27:42] [main/INFO]: Loading tweaker com.mumfrey.liteloader.launch.LiteLoaderTweaker from liteloader-1.7.10.jar
[14:27:42] [main/WARN]: The coremod codechicken.nei.asm.NEICorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[14:27:42] [main/WARN]: The coremod openeye.CorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
[14:27:42] [main/INFO]: Loading tweaker optifine.OptiFineForgeTweaker from OptiFine_1.7.10_HD_A4.jar
[14:27:42] [main/INFO]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[14:27:42] [main/INFO]: Loading tweak class name com.mumfrey.liteloader.launch.LiteLoaderTweaker
[14:27:42] [main/INFO]: Loading tweak class name optifine.OptiFineForgeTweaker
[14:27:42] [main/INFO]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
[14:27:42] [main/INFO]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[14:27:42] [main/ERROR]: Unable to launch
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_20]
at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_20]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]