I found a discussion from several years back titled: "jre-6u17-windows-i586.exe & security certificate".
I was going to try to add an update to the other discussion, but the option wasn't available, so i decided to start another.
I wanted to mention that we encountered this same problem with our image building. We were trying to use a custom definition patch that would install JRE 23, but everytime it would execute, it would pop the same message as in the other discussion. Tried many things, but in the end the only thing that worked was creating a distribution package, and setting it up to run as the current user. By doing this, it never prompts.