I have been having quite a time installing Flash 9 with IE 7 and my earlier version of IE.
This took me some time to figure out so I thought I'd share my solution. I tried editing the registry, I found this complete standalone installer that finally fixed the problem ! This is what you should do...
1. Download the un-installer and un-install Flash Player.
2. Then restart your computer.
3. Go to the Adobe website and install Flash Player again. The address is below.
http://www.adobe.com
4. Next, download the standalone installer.
http://fpdownload.macromedia.com
After downloading it, install it.
5.Done ! Verify Flash player is working by going to this link.
http://www.adobe.com/go/15507
Note: I have Microsoft Windows Home Edition SP2. I also have IE7.