I upgraded to Yosemite, and suddenly I ran into a ton of problems. The worst problem is that I now have a Java worm. I constantly get a pop-up, even as soon as I start my computer, that says, "To view this web content, you need to install the Java Runtime Environment. Click "More Info..." to visit the website for the Java Runtime Environment." (And then there are two buttons, "More Info..." and "OK," which is always highlighted in black. I have run Avast twice (it takes about 3-1/2 hours to scan the entire machine). It finds the worm in two places: /Library/Application Support/JavaW and /Library/LaunchDaemons/com.JavaW.plist The "infection details" are: MacOS:IWorm-B [Cryp] and MacOSIWorm-F [Trj] respectively. I've deleted them twice via Avast, but then when I re-run the test, it still finds them, not to mention I'm still getting the pop-ups.