HHC.exe command process hangs indefinitely

Having all the needed files to compile a chm, but when you run the hhc.exe command, the process hangs indefinitely.

We learned that some Windows updates caused the hhc.exe to unregister itself. A batch file that re-registered the server .dlls for the HTMLHelp workshop may work for you. Ran it every Wednesday morning. Rebooting the server also clears this situation.