Facebook tells me that I need to install flashplayer to upload multiple photos. I click and try to install, but it tells me I must close Explorer, when it is already closed. I even deleted it from the task bar to see if that was the problem. The only thing I haven't done is to uninstall Explorer, because it does not appear in the control panel for that. And yet, when after failing to install the Adobe page opens again with "check if you have flashplayer", it tells me I have the latest version. Help, [please. I only want to many upload photos at once. Thank you in advance, Hernanis.
This is a known problem with Internet Explorer 11, which Microsoft has been aware of since October 18 when they released their latest "untested" browser. 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.