November 21, 2009
http://www.java.com/download/help/error_25099.xml

Error: 25099 during Java installation

This article applies to:
  • Platform(s): Windows 2000 ,  Windows XP ,  Vista ,  Windows 2003
  • Browser(s): All Browsers
  • Java version(s): 6.0 ,  6u10+
SYMPTOMS

While Java installation is in progress, a message box with the following error is displayed:

Error 25099. Unzipping core files failed.
CAUSE

The actual root cause of this issue is still under investigation. Error 25099 indicates that the Java installation process has failed.
WORKAROUND

Step 1 : Completely delete content of the following directory: C:\Program Files\Java\jre6\ (or alternate directory if you chose a non-default install location)

Step 2 : If Step 1 has permission issues due to files being locked or in use, restart your system

Step 3 : Now, completely delete content of the following directory: C:\Program Files\Java\jre6\

Step 4 : Download and install Java.
  1. Go to Java.com
  2. Click on the Free Java Download button, and start the installation process.