Quercus Robur wrote:
> My wife just turned on her computer and up popped a window stating "You need
> to download XXX to clean up your computer. You have visited adult sites."
....


QR that popup is itself the virus and a phish to get you to "download"!!!!

Do not respond to the popup.

I recommend SUPERantispyware and PCRescue and of course you
already have an antivirus for your email, right?