Detecting a registry key with a space in the path from the CLI (or .bat file)?

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http://serverfault.com – I've run into a problem in which my experience (and Google-fu) have let me down. Basically, I need to push out KB968730 to a couple hundred clients or so. Naturally, would like to check for the installation of the hotfix before kicking off the install. Sadly, I need to do this with a script and a GPO, rather than a proper system like SCCM. Not normally something that would give me any issues, but, there seems to be a catch. The catch is that the path to the registry key this hotfix installs has a bloody space in it. Specifically, it installs to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windo (HowTos)