New Post: Help Deploying Adobe Reader 11.0.07

Adobe say that Adobe reader 11.0.07 can be installer over any versions of Adobe Reader starting XI. So your "IsInstallable" rule can be something like this :

<msiar:MsiProductInstalled ProductCode="{ac76ba86-7ad7-1036-7b44-ab0000000001}"/>
<bar:RegSzToVersion Key="HKEY_LOCAL_MACHINE" Subkey="SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall{AC76BA86-7AD7-1036-7B44-AB0000000001}" Value="DisplayVersion" Comparison="LessThan" Data="11.0.7.0"/>

and your "IsInstalled" ruel can be something like this :

<bar:RegSzToVersion Key="HKEY_LOCAL_MACHINE" Subkey="SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall{AC76BA86-7AD7-1036-7B44-AB0000000001}" Value="DisplayVersion" Comparison="EqualTo" Data="11.0.7.0"/>