Launcher won't work, error messages change randomly

Bootstrap (v5)
Current time is Apr 22, 2018 9:12:06 PM
System.getProperty('os.name') == 'Windows 10'
System.getProperty('os.version') == '10.0'
System.getProperty('os.arch') == 'amd64'
System.getProperty('java.version') == '1.8.0_171'
System.getProperty('java.vendor') == 'Oracle Corporation'
System.getProperty('sun.arch.data.model') == '64'

Looking for update
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma
Got reply in: 455ms
No update found.
Reversing LZMA on C:\Users\Jesse§\AppData\Roaming\.minecraft\launcher.pack.lzma to C:\Users\Jesse§\AppData\Roaming\.minecraft\launcher.pack
Unpacking C:\Users\Jesse§\AppData\Roaming\.minecraft\launcher.pack to C:\Users\Jesse§\AppData\Roaming\.minecraft\launcher.jar
Cleaning up C:\Users\Jesse§\AppData\Roaming\.minecraft\launcher.pack
Starting launcher.
FATAL ERROR: java.lang.ExceptionInInitializerError
	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:240)
	at net.minecraft.bootstrap.Bootstrap.execute(Bootstrap.java:124)
	at net.minecraft.bootstrap.Bootstrap.main(Bootstrap.java:381)
Caused by: java.lang.SecurityException: SHA-256 digest error for com/google/common/util/concurrent/Futures$ImmediateFuture.class
	at sun.security.util.ManifestEntryVerifier.verify(Unknown Source)
	at java.util.jar.JarVerifier.processEntry(Unknown Source)
	at java.util.jar.JarVerifier.update(Unknown Source)
	at java.util.jar.JarInputStream.read(Unknown Source)
	at java.util.zip.ZipInputStream.closeEntry(Unknown Source)
	at java.util.zip.ZipInputStream.getNextEntry(Unknown Source)
	at java.util.jar.JarInputStream.getNextEntry(Unknown Source)
	at java.util.jar.JarInputStream.getNextJarEntry(Unknown Source)
	at org.apache.logging.log4j.core.config.plugins.ResolverUtil.loadImplementationsInJar(ResolverUtil.java:384)
	at org.apache.logging.log4j.core.config.plugins.ResolverUtil.loadImplementationsInJar(ResolverUtil.java:343)
	at org.apache.logging.log4j.core.config.plugins.ResolverUtil.findInPackage(ResolverUtil.java:272)
	at org.apache.logging.log4j.core.config.plugins.PluginManager.collectPlugins(PluginManager.java:174)
	at org.apache.logging.log4j.core.config.plugins.PluginManager.collectPlugins(PluginManager.java:130)
	at org.apache.logging.log4j.core.lookup.Interpolator.<init>(Interpolator.java:45)
	at org.apache.logging.log4j.core.config.BaseConfiguration.doConfigure(BaseConfiguration.java:258)
	at org.apache.logging.log4j.core.config.BaseConfiguration.start(BaseConfiguration.java:142)
	at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:339)
	at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:378)
	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)
	... 7 more

Please fix the error and restart.

I have reinstalled Java, tried 32bit java, reinstalled minecraft, changed the minecraft directory, but none of these have changed the error message.

With the old launcher the launcher itself does not even open. With the new launcher it does open, but the game doesn't and logs contain this same error.

It's been like this for around 2 to 3 months now, I finally found the time to do this small report.

• Hatti

EDIT:

Hello,

I tried creating a new account on my computer with no special characters in the name, just letters. I ran minecraft.exe and it gives me the same error as I talked about earlier.

Same thing happens when I try to change the directory that minecraft works in.