Since megayachts aren't going to buy themselves, Larry Ellison's Oracle has been picking up extra cash for years by slipping adware to Windows users via its ubiquitous Java software. If you felt smug because you were on a Mac, guess what! Installing Java on your OSX-equipped MacBook could now lead to an unexpected encounter with the dreaded "Ask.com" toolbar, too. Though not as dangerous as SuperFish, the program will hijack your browser's search functions and delivery iffy, ad-laden results while being tricky for neophytes to remove. If you don't pay attention during installation, you can easily end up with it, as you need to purposefully opt out to avoid it.