Larry has a flashing blue and gold shield that wants him to install a java program. He says no, but it pops up again a few minutes later. Leo says it could be benign, or it could be a concern. Java is a programming language and many websites use it. But Larry's computer is set up correctly to ask permission to install it. It bothers Leo that it says "Publisher unknown," and not "Oracle." Leo says to keep saying no is the best move.
Rootkit Revealer from Microsoft’s SysInternals site may also help and he can always reset his browser, clearing cache and history.