Mark hears that when downloading Java, junkware downloads with it. Leo says that Java is now being bundled with adware, so he should make sure he unchecks the option. Better yet, he shouldn't download and install Java unless he needs it.
He should also make sure that it doesn't load automatically in his browser, which is a security issue. Java uses Kommodia, which actually breaks the encryption technology of a browser. So Marks' wife should remove it immediately.