Ah - didn't know about those. When I was using Windows, I got rid of RealPlayer years ago. Ditto for Apple QuickTime. Each is borderline "malware" that infiltrates itself in to all corners of your installation, reports what you're doing, and generally gets in the way. You don't need them for YouTube or anything like that: the last site I saw using RealPlayer was the BBC. You can still view the relevant media with Real Alternative and QuickTime Alternative.