What exactly means "unable"?
OK! Let's take 7 steps ... an easy answer to a focus problem not a machine problem.
1.1. Download the Adobe Flash Player file version 14 at Adobe - Install Adobe Flash Player
1.2 or dowonload the above link: http://download.macromedia.com/pub/flashplayer/current/support/install_flash_player_osx.dm g
2.1 Double-click the AdobeFlashPlayerInstaller_14_ltrosxd_aaa_aih.dmg in your download folder
4. Do not double-click the red face (png file) - Installer "Install Adobe Flash Player".
5. Right click the face to perform a precise selection: Show Package Contents.
6.1 Select - Contents and double click; Select - Resources and double click; Select - Adobe Flash Player.pkg and double click.
6.2 Warning!! Select - Contents and double click; Select - Resources and double click; Select - app.bundle and copy it to your internet plugin folder (more work!!)
7. Select: Continue and complete your installation.
Your instructions are for Mac OS, not Vista!
You have posted the same exact (incorrect) MAC instructions on four different WINDOWS threads. Please read the thread before posting irrelevant information that doesn't provide assistance to the original issue.