What’s with this WMPUB directory?

I was recently going through my windows lockdown procedure, cleaning up unnecessary files and noticed that every Windows 2003 Server I own has a wmpub directory in the root of my C drive. The only thing in the directory is an empty subdirectory named wmiislog.

Since I strongly believe that a clean system is conducive to security, and I especially hate clutter in my root dir, I tried deleting the folder, only to find that it was in use and could not be deleted. Annoyed with this empty directory I did some research to find out exactly what this was.

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