Specific files or registry entries for an individualised Windows Media Player

[tominator]

Hello,

I'm making an installer that installs Windows Media Player and the individualisation-update (the one that lets you play encrypted windows media-files).

Ive been looking at the registry and in the FairUse4WM-posts but can't seem to find an answer for my question.

I want to be able to see if the individualisation-update is installed (so that I don't install it if it exists).

What I need is a specific registry entry or file that only exists when this update is installed. I've been looking at blackbox.dll and HKEY_LOCAL_MACHINE\Software\Microsoft\DRM but both exist on computers that don't have the update.

Does anyone know about something I could use?

[foxyshadis]

Test the version number of blackbox.dll. If you need a command-line method, use sigcheck (http://www.microsoft.com/technet/sysinternals/FileAndDisk/Sigcheck.mspx) to do it. Any build # above the one included in the update will include the update. If there are separate updates for 10 and 11, you'll have to check against the pertinent build.