Flash Player on Windows 8+ for Internet Explorer is a built-in component of Internet Explorer. There is nothing to uninstall or re-install. The issues you're experiencing are probably the result of changes in Internet Explorer 11. You can try putting affected websites into Compatibility Mode - Fix site display problems with Compatibility View - Windows Help or as a workaround, use an alternate browser like Google Chrome.
Thanks for the reply Jeromie. I've already tried compatibility Mode to no avail. As for using Chrome, I'd love to! Unfortunately, Chrome is somehow allergic to something else I'm running. I've had several Windows 8 and 8.1 computers, and all of them eventually had problems running Chrome. It runs, but very poorly on many sites. So, much to my disappointment, I'm stuck using IE =(
Now if I could just fix this new flash problem in IE I'd be set! Maybe I can uninstall IE 11 and re-install? Do you think that would re-set flash player?
Flash Player on Windows 8+ for Internet Explorer is a built-in component of Internet Explorer. There is nothing to uninstall or re-install.
The publisher should not be listed as 'Not Available', it should look similar to the following, listing the publisher and version:
You said in your first post "but It's already installed and it has worked fine before". Did you install any Internet Explorer updates recently, and if so, what is the KB number for them? You can view installed updates in the Control Panel > Windows Update > View update history and look for the Internet Explorer updates. If there are recent updates installed, you may want to uninstall the update and try re-installing again. As Jeromie says, Microsoft updates Flash Player in Internet Explorer on Windows 8.x and above. This could be a failed update install, or something else.