Minecraft Forums

So this started when the first pre-realese came out and the launcher says update found but it just keeps showing this

Found cached update
Renaming C:\Users\Yanko\AppData\Roaming\.minecraft\launcher.pack.lzma.new to C:\Users\Yanko\AppData\Roaming\.minecraft\launcher.pack.lzma
Unable to rename - could be on another filesystem, trying copy & delete.
Copy & delete succeeded.
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\Yanko\AppData\Roaming\.minecraft\launcher.pack.lzma to C:\Users\Yanko\AppData\Roaming\.minecraft\launcher.pack
FATAL ERROR: net.minecraft.bootstrap.FatalBootstrapError: Unable to un-lzma: LZMA.LzmaException: LZMA header corrupted : Properties error
at net.minecraft.bootstrap.Bootstrap.unpack(Bootstrap.java:146)
at net.minecraft.bootstrap.Bootstrap.execute(Bootstrap.java:123)
at net.minecraft.bootstrap.Bootstrap.main(Bootstrap.java:381)


Please fix the error and restart.

And when it dosen't show that is show this

Exception: java.net.SocketTimeoutException: Read timed out
Downloading: https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma (try 10/10)

Ok every one I fixed it by updating java but now I came across something else

[21:14:21 INFO]: Unpacking natives to C:\Users\*Name*\AppData\Roaming\.minecraft\versions\1.8\1.8-natives-122746937798100
[21:14:21 ERROR]: Couldn't unpack natives!
java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method) ~[?:1.8.0_25]
at java.util.zip.ZipFile.<init>(Unknown Source) ~[?:1.8.0_25]
at java.util.zip.ZipFile.<init>(Unknown Source) ~[?:1.8.0_25]
at java.util.zip.ZipFile.<init>(Unknown Source) ~[?:1.8.0_25]
at net.minecraft.launcher.game.MinecraftGameRunner.unpackNatives(MinecraftGameRunner.java:366) ~[launcher.jar:?]
at net.minecraft.launcher.game.MinecraftGameRunner.launchGame(MinecraftGameRunner.java:111) [launcher.jar:?]
at com.mojang.launcher.game.runner.AbstractGameRunner.onDownloadJobFinished(AbstractGameRunner.java:185) [launcher.jar:?]
at com.mojang.launcher.updater.download.DownloadJob.popAndDownload(DownloadJob.java:122) [launcher.jar:?]
at com.mojang.launcher.updater.download.DownloadJob.access$000(DownloadJob.java:12) [launcher.jar:?]
at com.mojang.launcher.updater.download.DownloadJob$1.run(DownloadJob.java:86) [launcher.jar:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_25]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_25]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_25]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_25]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_25]

And while downloading the update a lot of times i've also been getting

Had local file but it was the wrong size... had 1891400 but expected 1976731
The numbers change alot to hope that helps

Bump

Delete .minecraft. It is located in "C:\Users\*Name*\AppData\Roaming". Then redownload and reinstall the game.

Ok, I'll try and tell you what happens

Yea its not working

It looks like MC can't open some of the files. I have no idea how to fix it.

Appears to be a corrupt download, try again I guess? Or see if you can download on a different computer / internet connection, then copy the files over?