Give us some information about your environment - OS & version, browsers & versions?
Usually you just go to the browser's Tools | Add-ons, and enable the add-ons you want to enable.
P.S. the Flash Player add-on is called Shockwave Flash Object.
My OS is
My OS is MS Windows XP Professional 2002 SP3.
I use two browsers: Windows Internet Explorer 8 (version 8.0.6001.18702) and Mozilla Firefox (version 3.6.13).
After uninstalling and reinstalling Flash, I was able to reinstall Shockwave in FF, and now I can see Flash content in FF.
However, I don't see an Adobe Flash Player specific add-on in IE, and I am still being prompted to install "Macromedia Flash Player" when I try to access such content in IE (such as changing my Yahoo Avatar or viewing eCards).
Because I can use FF when I need to view content, my issue is not as critical; nevertheless, it would be nice if I could access Flash content without worrying about which browser I'm using.
There are two different installers; one for Internet Explorer (ActiveX), and one for all other browsers (plugin).
You can download the ActiveX installer here http://fpdownload.adobe.com/get/flashplayer/current/install_flash_player_ax.exe
I used your link, I installed it again, and again, and one more time just to be sure. Each time, the install seemed to work fine. However, after each attempt, I was unable to run Flash content and was again prompted to install Flash player. I must be doing something wrong, but I cannot figure out what.
Can you see the Shockwave Flash Object under Tools | Add-ons?
Not in Internet Explorer, no.
What files do you have in C:\Windows\system32\Macromed\Flash ?
Is Shockwave Flash Object enabled in Internet Explorer | Tools | Add-ons ?