So I was playing Factions with a few friends, and they recommended that I should get a few mods. They told me to download the program: Forge. I followed all the steps, and clicked: "install client". It stopped at:

 

Downloading Libraries

Considering library org.scala-lang-compiler:2.11.1

 

I thought it was my internet, so installed again. Its stopped in the same spot. I followed multiple youtube videos, and it still didn't work. I tried 1.7, 1.8, win-installer, installer, recommended, newest, etc. I thought it was windows 10, but its not. I realized that when I clicked: "install client", a notepad icon appeared on my desktop. I clicked on the .exe, and it said:

 

Considering library net.minecraftforge:forge:1.8-11.14.3.1521: Not Downloading

Considering library io.netty:netty-all:4.0.15.Final: Not Downloading

Considering library net.minecraft:launchwrapper:1.12: Not Downloading

Considering library org.ow2.asm:asm-all:5.0.3: Not Downloading

Considering library com.typesafe.akka:akka-actor_2.11:2.3.3

Checking "C:\Users\Henry\AppData\Roaming\.minecraft\libraries\com\typesafe\akka\akka-actor_2.11\2.3.3\akka-actor_2.11-2.3.3.jar" internal checksums

    checksums.sha1 validated successfully

    Jar contents validated successfully

Considering library com.typesafe:config:1.2.1

Checking "C:\Users\Henry\AppData\Roaming\.minecraft\libraries\com\typesafe\config\1.2.1\config-1.2.1.jar" internal checksums

    checksums.sha1 validated successfully

    Jar contents validated successfully

Considering library org.scala-lang:scala-actors-migration_2.11:1.1.0

Checking "C:\Users\Henry\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-actors-migration_2.11\1.1.0\scala-actors-migration_2.11-1.1.0.jar" internal checksums

    checksums.sha1 validated successfully

    Jar contents validated successfully

Considering library org.scala-lang:scala-compiler:2.11.1

Checking "C:\Users\Henry\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-compiler\2.11.1\scala-compiler-2.11.1.jar" internal checksums

Exception in thread "main" java.lang.IllegalArgumentException: MALFORMED

at java.util.zip.ZipCoder.toString(Unknown Source)

at java.util.zip.ZipCoder.toStringUTF8(Unknown Source)

at java.util.zip.ZipInputStream.readLOC(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 net.minecraftforge.installer.DownloadUtils.validateJar(DownloadUtils.java:298)

at net.minecraftforge.installer.DownloadUtils.checksumValid(DownloadUtils.java:154)

at net.minecraftforge.installer.DownloadUtils.downloadInstalledLibraries(DownloadUtils.java:73)

at net.minecraftforge.installer.ClientInstall.run(ClientInstall.java:135)

at net.minecraftforge.installer.InstallerAction.run(InstallerAction.java:42)

at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:290)

at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:154)

at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:40)

 

Is there a way to fix this? I really want to download forge!

Delete the scala compiler jar from your libraries folder, it's corrupt, the installer will re-dowload and install it again.

I am having the same problem, I am running win 10 just like in the problem and im getting that Libraries are not downloading the librarys are the 2.11 ones .. What should i do?

If you're having the same exact error then follow the same exact answer I gave that guy. If not then don't hijack other's threads.