Remove prior installations of Java that are not working before trying to install
again. ... Active firewall or antivirus software may prevent Java from installingproperly. ... Browsers may disable the Java plug-in or related add-ons by default.
... The Exception Site List feature is being introduced in the release of Java 7
Jan 28, 2014 ... 2.1 If the Java plugin does not appear in the Add-ons Manager even though ...
error when Java is activated, due to security changes in Java 7 Update 51: ... If
Java is installed but isn't working, make sure that the Java plugin is ... X 10.6 or
below, it may also be listed as Java Plug-in 2 for NPAPI Browsers).