After I completely rebooted my computer and tried to install feed the beast this message comes up when I try to play any modpack.
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Syncing Assets:
Java Path: C:\Program Files\Java\jre7\bin\javaw.exe
Setting MinMemory to 256
Setting MaxMemory to 1024
Defaulting PermSize to 256m
Feb 06, 2014 3:15:22 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Feb 06, 2014 3:15:22 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Feb 06, 2014 3:15:22 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
2014-02-06 15:15:22 [INFO] [ForgeModLoader] Forge Mod Loader version missing.missing.missing.missing for Minecraft missing loading
2014-02-06 15:15:22 [INFO] [ForgeModLoader] Java is Java HotSpot(TM) 64-Bit Server VM, version 1.7.0_51, running on Windows 7:amd64:6.1, installed at C:\Program Files\Java\jre7
2014-02-06 15:15:22 [INFO] [STDERR] java.lang.NoClassDefFoundError: cpw/mods/fml/common/DummyModContainer
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.ClassLoader.defineClass1(Native Method)
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.ClassLoader.defineClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.security.SecureClassLoader.defineClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.net.URLClassLoader.defineClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.net.URLClassLoader.access$100(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.net.URLClassLoader$1.run(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.net.URLClassLoader$1.run(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.security.AccessController.doPrivileged(Native Method)
2014-02-06 15:15:22 [INFO] [STDERR] at java.net.URLClassLoader.findClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:113)
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.Class.forName0(Native Method)
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.Class.forName(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at cpw.mods.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:386)
2014-02-06 15:15:22 [INFO] [STDERR] at cpw.mods.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:310)
2014-02-06 15:15:22 [INFO] [STDERR] at cpw.mods.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:212)
2014-02-06 15:15:22 [INFO] [STDERR] at cpw.mods.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:90)
2014-02-06 15:15:22 [INFO] [STDERR] at cpw.mods.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:67)
2014-02-06 15:15:22 [INFO] [STDERR] at cpw.mods.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:34)
2014-02-06 15:15:22 [INFO] [STDERR] at cpw.mods.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:124)
2014-02-06 15:15:22 [INFO] [STDERR] at net.minecraft.launchwrapper.Launch.launch(Launch.java:111)
2014-02-06 15:15:22 [INFO] [STDERR] at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
2014-02-06 15:15:22 [INFO] [STDERR] Caused by: java.lang.ClassNotFoundException: cpw.mods.fml.common.DummyModContainer
2014-02-06 15:15:22 [INFO] [STDERR] at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:186)
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] ... 23 more
2014-02-06 15:15:22 [INFO] [STDERR] Caused by: java.io.FileNotFoundException: C:\Users\Muffin\Desktop\Matt's Stuff (The system cannot find the file specified)
2014-02-06 15:15:22 [INFO] [STDERR] at java.util.zip.ZipFile.open(Native Method)
2014-02-06 15:15:22 [INFO] [STDERR] at java.util.zip.ZipFile.<init>(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.util.zip.ZipFile.<init>(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.util.jar.JarFile.<init>(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.util.jar.JarFile.<init>(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at sun.net.www.protocol.jar.URLJarFile.<init>(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at sun.net.www.protocol.jar.URLJarFile.getJarFile(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at sun.net.www.protocol.jar.JarFileFactory.get(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at sun.net.www.protocol.jar.JarURLConnection.connect(Unknown Source)
Logging in...
Login complete.
Syncing Assets:
Java Path: C:\Program Files\Java\jre7\bin\javaw.exe
Setting MinMemory to 256
Setting MaxMemory to 1024
Defaulting PermSize to 256m
Feb 06, 2014 3:15:22 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Feb 06, 2014 3:15:22 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Feb 06, 2014 3:15:22 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
2014-02-06 15:15:22 [INFO] [ForgeModLoader] Forge Mod Loader version missing.missing.missing.missing for Minecraft missing loading
2014-02-06 15:15:22 [INFO] [ForgeModLoader] Java is Java HotSpot(TM) 64-Bit Server VM, version 1.7.0_51, running on Windows 7:amd64:6.1, installed at C:\Program Files\Java\jre7
2014-02-06 15:15:22 [INFO] [STDERR] java.lang.NoClassDefFoundError: cpw/mods/fml/common/DummyModContainer
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.ClassLoader.defineClass1(Native Method)
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.ClassLoader.defineClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.security.SecureClassLoader.defineClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.net.URLClassLoader.defineClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.net.URLClassLoader.access$100(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.net.URLClassLoader$1.run(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.net.URLClassLoader$1.run(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.security.AccessController.doPrivileged(Native Method)
2014-02-06 15:15:22 [INFO] [STDERR] at java.net.URLClassLoader.findClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:113)
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.Class.forName0(Native Method)
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.Class.forName(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at cpw.mods.fml.relauncher.CoreModManager.loadCoreMod(CoreModManager.java:386)
2014-02-06 15:15:22 [INFO] [STDERR] at cpw.mods.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:310)
2014-02-06 15:15:22 [INFO] [STDERR] at cpw.mods.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:212)
2014-02-06 15:15:22 [INFO] [STDERR] at cpw.mods.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:90)
2014-02-06 15:15:22 [INFO] [STDERR] at cpw.mods.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:67)
2014-02-06 15:15:22 [INFO] [STDERR] at cpw.mods.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:34)
2014-02-06 15:15:22 [INFO] [STDERR] at cpw.mods.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:124)
2014-02-06 15:15:22 [INFO] [STDERR] at net.minecraft.launchwrapper.Launch.launch(Launch.java:111)
2014-02-06 15:15:22 [INFO] [STDERR] at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
2014-02-06 15:15:22 [INFO] [STDERR] Caused by: java.lang.ClassNotFoundException: cpw.mods.fml.common.DummyModContainer
2014-02-06 15:15:22 [INFO] [STDERR] at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:186)
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.lang.ClassLoader.loadClass(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] ... 23 more
2014-02-06 15:15:22 [INFO] [STDERR] Caused by: java.io.FileNotFoundException: C:\Users\Muffin\Desktop\Matt's Stuff (The system cannot find the file specified)
2014-02-06 15:15:22 [INFO] [STDERR] at java.util.zip.ZipFile.open(Native Method)
2014-02-06 15:15:22 [INFO] [STDERR] at java.util.zip.ZipFile.<init>(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.util.zip.ZipFile.<init>(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.util.jar.JarFile.<init>(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at java.util.jar.JarFile.<init>(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at sun.net.www.protocol.jar.URLJarFile.<init>(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at sun.net.www.protocol.jar.URLJarFile.getJarFile(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at sun.net.www.protocol.jar.JarFileFactory.get(Unknown Source)
2014-02-06 15:15:22 [INFO] [STDERR] at sun.net.www.protocol.jar.JarURLConnection.connect(Unknown Source)