New Post: Adobe Flash Plugin stays in 'Not Installed'

Hi, your rules looks like ok. You can try search for these registry key to see if they exists :

<sdp:IsInstallable> 
   <lar:And> 
      <bar:RegSzToVersion RegType32="true" Data="18.0.0.209" Comparison="LessThan" Value="Version" Subkey="Software\Macromedia\FlashPlayerPlugin" Key="HKEY_LOCAL_MACHINE"/>
      <bar:RegKeyExists RegType32="true" Subkey="Software\Macromedia\FlashPlayerPlugin" Key="HKEY_LOCAL_MACHINE"/>
   </lar:And> 
</sdp:IsInstallable>

Also, you can edit the update and look at the metadata of the MSI file. There is some "IsInstallable" rules in it.