Corrupt Flash Player install after IE 7 upgrade

Some of people shot me an e-mail about this. They said their youtube works find until they update the Internet Explorer, so I wanted to post some info about it to resolve this.
It generally goes like this:
A user has Flash Player 9 installed on their system and everything works fine with IE6. The user then runs the IE7 update and their computer stops showing YouTube or Yahoo video and so on. However, if the user goes to some other sites with Flash content, the content will play just fine, even if the site requires the Flash 9 Player.
Dunno how it happened, cuz I use firefox, I suppose that when you upgrade from IE7, the browser install is not correctly reinstalling your existing Flash Plugin, so scripts that check for the Flash Player are failing, but since the plugin file is there, if you visit a site that does not use a detection script you will see the Flash content just fine.
There may not be a solution to this for the sites using detection scripts - they rely on a series of Windows registry entries that seem to be missing after an IE7 upgrade.
For users, here is a fix that seems to work well:
1. Quit all open programs. This step is important because other programs may be using the Flash Player, and if they are, the uninstaller will fail silently.
2. Run the Adobe Flash Player Uninstaller.
3. Reinstall your Flash player.
Maybe you should restart your computer after this, you know,sometimes a system restart can make a difference.