This is an old trick, but recently a new wave of attempts have surfaced on this. You’re visiting a website, and either a browser window pop-up message or a window embedded in the page you’re visiting tells you to update to the latest version of Flash Player. The fake windows are also getting better in quality and harder to tell from the legit ones.

If you don’t have Flash set up to update automatically, I encourage you to go straight to the source for updates: http://get2.adobe.com/flashplayer/. Do not act on any pop-up windows luring you to update your Flash Player.

Stay safe.