RealPlayer can cause conflicts with Flash Player because it tries to assign EVERY TYPE of video or audio file to itself by default. I haven't used RealPlayer in years for that reason. It's an unnecessary program anymore. There are apps loike VLC media player that cna do EVERYTHING it does without conflicting with other apps like Flash Player.
With WIndows 8, Microsoft began embedding FlashPlayer themselves into Internet Explorer. Because of that, you cannot download and install it from here. You cannot uninstall it from Internet Explorer without removing a specific Windows Update first. And you cannot update it via this website. ONLY through Windows Update can Flash Player for Internet Explorer be updated.
That said, you probably DON'T have a virus that's causing the problems with Flash Player and Internet Explorer. Many, many websites are not "recognizing" the browser.
This is a known problem with Internet Explorer 11, which Microsoft has been aware of since October 18 when they released IE11 The pages can't recognize the browser, so they don't recognize any of the plugins, like Flash Player.
So far, Microsoft has made NO indication that they have any plan to fix it soon.
Microsoft's recommendation is to use Compatibility View for affected pages, and "pretend" you're using an different browser. Trouble with that is it has seen limited success at best, and you have to individually enable it for EVERY page that has problems.
I'm not big on "pretending" so I recommend actually using another browser.
ANY of those will work where IE11 won't, with the Flash Player Plug-in (For all other browsers), and Chrome doesn't even need that because it has its own Flash Player plugin built in.