I just learned the hard way about why it is no longer a good idea to install or use Java on your Wintel computer or especially Java extensions in browsers. Internet Explorer seems the most vulnerable to this form of malware. Apple caught on to this scam early enough to disable Java in later versions of Safari in OSX with the equivalent of ClicktoFlash, an extension which stops most malware popups before they start. The bad guys who exploit this Java security hole are the same ones who call you up on your telephone representing themselves as Microsoft and attempt to goad you into giving them access to your computer, which they will promptly corrupt and then ask you for a credit card number to sign up you and your computer up for a pricey multi-year tech support package. The crap they leave behind on your computer to connect with their server each time you reboot the computer is a nightmare. Don't fall for it. The warnings about this practice and how Java and Java browser extensions are available on the internet, but are not forceful enough. In Internet Explorer, access Tools:Internet Options:Manage Add-Ons. Remove any having anything to do with Java. In Control PanelPrograms and Features, remove any program that has the word Java anywhere in its description. I hope Windows 10 fixes this problem the same way Apple did. It's more than a tiny bit of pain to leave such a gaping hole in Java. Too bad, the scammers ruined something that used to be good. Don't bother complaining to Microsoft or the Fed. They don't seem to be in the least measure interested in taking down these scammers.