why can't i update the latest software for my macbook pro Java os x 2012-003

For some reason i cannot get the latest update on my macbook pro, the software update is "Java OS X 2012-003". Why can't i do this. When i attempt, it says "The update could not be expanded, and may have been corrupted during downloading. The update will be downloaded and checked again the next time that Software Update runs".

I do run Java, so i would really like this update. If any body knows what's going wrong please help me.

I did recently install a parallel program and installed Windows 7 64-bit, im not really sure if this matters but since the installations it's the first time i haven't been successful updating my software.

THIS IS THE FIRST BOX I GET BELOW

Software updates are available for your computer. Do you want to install them?

You can continue to use your computer during the installation.

You don't need to restart it when the installation is complete.

Note: Use of this software is subject to the original Software License Agreement(s) that accompanied the software being updated. A list of Apple SLAs may be found here: http://www.apple.com/legal/sla/

DETAILS BELOW

Basically the Software Update removes the most common variants of the Flashback malware. This update also configures the Java web plug-in to disable the automatic execution of Java applets. Users may re-enable automatic execution of Java applets using the Java Preferences application. If the Java web plug-in detects that no applets have been run for an extended period of time it will again disable Java applets. This update is recommended for all Mac users with Java Installed. For details about this update see: http://support.apple.com/kb/HT5242