My flash got unistalled and I can not find out how to reinstall it

Flash Player for IE in Windows 8 and 8.1 is embedded by Microsoft, and without removing several unique registry keys, and one specific Windows Update KB Patch, it cannot be uninstalled.

I seriously doubt you, or anything on your system, did all that, so it IS still installed.

If you're one of the unlucky souls who updated to IE11, your problems stem from the browser, NOT the Flash Player plugin.

Microsoft really did a number on the code for IE11, and 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.

Firefox (from Mozilla)

Opera (from Opera)

Safari (from Apple)

Chrome (from Google)

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.