Changes
Java
,Made note about patch-in-place failing with error 25099
Actually, with Update 10 and later Sun has introduced as default the so called "patch in place" update mechanism (see: http://java.sun.com/javase/6/docs/technotes/guides/jweb/otherFeatures/jre_install.html) which automatically removes the previous version of the same Java family (unless you turned off patch-in-place using the installer). So the line that tries to remove a previously installed Update 10 (msiexec /qn /x {26A24AE4-039D-4CA4-87B4-2F83216010FF}) is not strictly necessary (if you installed a 'Family JRE' and not a 'Static JRE').
Patch-in-place sometimes fails with "Error 25099. Unzipping core files failed", returning error code 1603 from msiexec. Sometimes installation will succeed on a later reboot without any intervention, but sometimes it continues to fail. As of December 2010, the root cause is not known, but Sun/Oracle suggests (at http://www.java.com/en/download/help/error_25099.xml) removing %PROGRAMFILES%\Java\jre6 before retrying installation. A fully-automatic workaround requires the ability to execute commands in response to particular error codes and thus may need to take the form of a batch program wrapped around msiexec.
==== JRE without Java Quick Starter on 32-bit hosts ====