I have continued problems with flash player using ie 11

I had a previous version 19 and had problems when I would go to a web site to play a video and they would say that I need to install flash player and I had it installed. So I decided to install the newer version of flash player and I deleted the older version and tried to install the newest version. I tried many times to install with multi problems ONE- doesn't install and says I do not have the proper priviliges. TWO-active x is not registered and I don't know if I even have it installed since it doesn't say it was done. In the older version I would have to re-install flash each time I visited a web site to watch a video and I would check n\my add-ons and it was enabled. I don't know why I am having so many problems trying to install or use flash player