Fake Firefox Update

For a few months now I've gotten what appears to be a Firefox Update popup. It covers the whole screen in orange with the FF logo and the smaller download (save/cancel) popup. The first 2 times I clicked save. Didn't know it gave me Malware with the name Powerliks.gen. Found it when checking the quarantine folder of my antivirus. Luckily, Vipre, my antivirus software has great customer service and remotely cleaned it from my registry. I have gotten this popup on two computers now. Has anyone else gotten this? Any info would be appreciated so I can pass it along to the Vipre people.
Fred