Moderator note
This issue may be caused by Antivirus / Firewall / bad Proxy / Parental control software or malware.
Workaround: Use the "old" Launcher:
Klick on Show all platforms
Follow the instructions:
Minecraft for Windows (alternative)
If you have issues with the new Windows download, you can try the old one by downloading Minecraft.exe. If given the option, save the file instead of running it. Save the file anywhere you'd like, then double-click the program to run. This does require Java to be installed, however.
Download the latest Java version from http://www.java.com/en/download/. (When using a 32-bit browser on a 64-bit operating system the automatic version detection will only show the 32-bit version of Java, the 64-bit version needs to be downloaded manually: http://www.java.com/en/download/manual.jsp )
just installed minecraft and before the launcher popes up it claims there is an unknown error. this error apparently comes from the mine craft launcher as that is what the program is called in the bar. please help
current version of 19/12/2014
From MCL-3337
Native Launcher Version: 4
Operating System: Windows Vista SP2
Application Hash: 527b44fc451b127eee56b88f79d9aeafb65ebda9
Java Version:
x64: 1
Starting download of: https://launchermeta.mojang.com/mc/launcher.json
Starting download of: https://launchermeta.mojang.com/mc/launcher.json
Starting download of: https://launchermeta.mojang.com/mc/launcher.json
Failed to download manifest
Failed to start application .\runtime\jre-x64\\bin\java.exe -cp "game\launcher.jar" net.minecraft.launcher.MainLinked issues
is duplicated by 6
MCL-3289
When I try to launch Minecraft, the Error. 'Unknown Error' pops up, and the launcher doesn't start
Resolved
MCL-3314
Minecraft Launcher does not run and gives 'Unknown error' message
Resolved
MCL-3315
start Minecraft, small window opens saying "Unknown Error"
Resolved
MCL-3337
Minecraft Launcher bug
Resolved
MCL-3341
Unknown error
Resolved
relates to 1
Attachments
Comments 12
Is that the new "Installer" or the "regular" Launcher downloaded from https://minecraft.net/download ?
the download was from https://minecraft.net/download windows Minecraft.msi
Seems the new launcher is giving an "unknown error" for some people.
Screenshot: http://imgur.com/1vxuKhg
Running java -jar minecraft.exe from command prompt returns: Error: Invalid or corrupt jarfile minecraft.exe
Running the old minecraft.exe or the .jar file works just fine.
Hello, I used to have the same problem as you guys.
Seeing as how the mod failed to help, I hope that this works for you. This seems to be a problem with the new launcher, but the old launcher should still work even if the new one fails. Make sure you have the correct version of Java (http://java.com/en/download/manual.jsp) downloaded for your system (32 or 64 bit depending on your OS) and use the old launcher as still available here (https://s3.amazonaws.com/Minecraft.Download/launcher/Minecraft.exe).
If your not interested in using the old launcher, you can try the JAR launcher that should work with the correct Java installation, available here. (https://s3.amazonaws.com/Minecraft.Download/launcher/Minecraft.jar)
I hope this works for you theirs not all that much I can think of. You can just drag the Minecraft.Jar Download to your desktop and use that to load up minecraft. Until Mojang finds a fix to this problem I hope this works!
@@unknown: Please don't spam your comment to every single duplicate of this ticket. One instance should be enough. Seeing that you want to help here, but keep in mind this site is not a user help forum, it's a bug tracker.
Please provide a screenshot.