mshta.exe > HTML Application HOST
http://howfunny.top263.net/techarticle/techdoc108.htm is where I found it. Might be more info on that site.
MS talks about it with printers/drivers, IE, and a bunch of other things. Another site says it handles the add/remove in the tools.
Must be another of Gates great management files gone awry. He seems to have one in every version and they are always junk.