Hry a zábava: Minecraft

Dobrý den. Dnes jsem podle rad svého kamaráda stahnul launcher pro hru minecraft. Mám nový počítač, takže jsem stáhnul i novou javu. Bohužel když jsem nainstaloval launcher, tak se v konzoli launcheru zobrazilo toto:

java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.(Unknown Source)
at java.util.zip.ZipFile.(Unknown Source)
at java.util.zip.ZipFile.(Unknown Source)
at a.a.a.a.a.a.a(Unknown Source)
at a.a.a.a.a.a.z(Unknown Source)
at a.a.a.a.a.a.a(Unknown Source)
at net.minecraft.launcher.updater.download.DownloadJob.popAndDownload(Unknown Source)
at net.minecraft.launcher.updater.download.DownloadJob.access$0(Unknown Source)
at net.minecraft.launcher.updater.download.DownloadJob$1.run(Unknown Source)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)


Mám Windows 8 a nevím, jestli není problém v tom. Děkuji za odpověď.