Minecraft Forums

I was starting up my minecraft launcher when this showed up:

FATAL ERROR: net.minecraft.bootstrap.FatalBootstrapError: Unable to un-lzma: java.io.FileNotFoundException: C:\Users\Aaron\AppData\Roaming\.minecraft\launcher.pack (The file or directory is corrupted and unreadable)
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.


I run a Windows 8 64-bit PC, but i dont know the version of Java i have

would someone help me please?

Quote from jingm

...

Hi,

You may need to try running Minecraft with a blank slate.

To do this, press your Windows+R keys, type in %AppData% at the dialog, and press Enter. In the window that appears, find the directory called .minecraft and right-click it to rename. Rename it to oldminecraft

If the above fails to work, you may have errors with certain parts of your hard drive.

Please see this article on checking your hard disc for errors.

Quote from Extreme_Heat

Hi,

You may need to try running Minecraft with a blank slate.

To do this, press your Windows+R keys, type in %AppData% at the dialog, and press Enter. In the window that appears, find the directory called .minecraft and right-click it to rename. Rename it to oldminecraft

If the above fails to work, you may have errors with certain parts of your hard drive.

Please see this article on checking your hard disc for errors.

Now the launcher wont start, nor will it download minecraft. D:

Quote from jingm

...

Quote from Extreme_Heat

Hi,

[..]

If the above fails to work, you may have errors with certain parts of your hard drive.

Please see this article on checking your hard disc for errors.