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My Minecraft all of a sudden just stopped working all of a sudden. It is unmodded and the .minecraft has been deleted and re-created but nothing seems to work. I've also tried using alternate launchers such as the Magic Launcher but I get the same error. If anyone knows how to fix the issue please help me out.

This is the error I get everytime I launch the Minecraft launcher:

Bootstrap started
Looking for update
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma
Didn't find an update in time.
Reversing LZMA on C:\Users\osameh\AppData\Roaming\.minecraft\launcher.pack.lzma to C:\Users\osameh\AppData\Roaming\.minecraft\launcher.pack
Got reply in: 1780ms
Unpacking C:\Users\osameh\AppData\Roaming\.minecraft\launcher.pack to C:\Users\osameh\AppData\Roaming\.minecraft\launcher.jar
No update found.
Cleaning up C:\Users\osameh\AppData\Roaming\.minecraft\launcher.pack
Starting launcher.
FATAL ERROR: java.lang.NoClassDefFoundError: com/sun/org/apache/xerces/internal/util/AugmentationsImpl
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.<init>(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.<init>(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XIncludeAwareParserConfiguration.<init>(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XIncludeAwareParserConfiguration.<init>(Unknown Source)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.ObjectFactory.newInstance(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.ObjectFactory.createObject(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.ObjectFactory.createObject(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.DOMParser.<init>(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.DOMParser.<init>(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.<init>(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.<init>(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl.setFeature(Unknown Source)
at org.apache.logging.log4j.core.config.XMLConfiguration.enableXInclude(XMLConfiguration.java:119)
at org.apache.logging.log4j.core.config.XMLConfiguration.newDocumentBuilder(XMLConfiguration.java:97)
at org.apache.logging.log4j.core.config.XMLConfiguration.<init>(XMLConfiguration.java:146)
at org.apache.logging.log4j.core.config.XMLConfigurationFactory.getConfiguration(XMLConfigurationFactory.java:40)
at org.apache.logging.log4j.core.config.ConfigurationFactory$Factory.getConfiguration(ConfigurationFactory.java:446)
at org.apache.logging.log4j.core.config.ConfigurationFactory$Factory.getConfiguration(ConfigurationFactory.java:420)
at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:377)
at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:149)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:85)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:34)
at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:387)
at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:322)
at net.minecraft.launcher.Launcher.<clinit>(Launcher.java:59)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at net.minecraft.bootstrap.Bootstrap.startLauncher(Bootstrap.java:226)
at net.minecraft.bootstrap.Bootstrap.execute(Bootstrap.java:112)
at net.minecraft.bootstrap.Bootstrap.main(Bootstrap.java:367)


Please fix the error and restart.

54 views, no answers..

Firstly, redownload the launcher: https://s3.amazonaws.com/Minecraft.Download/launcher/Minecraft.exe
Afterwards, reinstall Minecraft's locally installed files. To do so, press your Windows+R keys, type in %AppData% at the dialogue, and press Enter. In the window that appears, open the .minecraft directory, and delete everything except for the saves directory that you see therein. Then, try running Minecraft again. Good luck!