Another user had the same problem. Please see the thread here:
https://forum.avast.com/index.php?topic=153847.0. It sounds like you may have installed a developers version, which is usually a higher version number than those regular users use.
Java has it's own uninstaller
http://www.java.com/en/download/faq/uninstaller_toolinfo.xml. I would recommend that you download the current version of java (7 update 67) to your HD or somewhere you will know where it is. Download the java uninstaller tool to your desktop and keep it there since the java versions change so often
. Uninstall all versions of java and
REBOOT. Install the current version of java (7 update 67) and confirm the version. Under Computer > Java > check the version number to verify > disable automatic updates > Apply > OK > Reboot.
There is a known glitch in the Avast Software Updater that has some people confused that will be fixed with the next release. In the meantime, use the Updater to alert you that there is an update, but check the vendor's site to verify or check the forum here under General Topics it is often listed here as well.
Let us know if you have any questions. Thank you.