Remember Pando Media Booster? No? It was bloatware third-party software that some MMO companies -- notably Turbine and NCsoft -- used to force onto their users' machines, ostensibly to speed up peer-to-peer downloading of launchers and game clients.
Fortunately PMB died a well-deserved death in August of 2013, but those of you who may have unintentionally left it lurking on your machine should be aware of a security risk masquerading as a Pando update. According to Reddit user object404, if you receive a pop-up message offering you the chance to update PMB, what it's really offering is the Sweet Page browser virus, which you can remove by following these instructions.