It opens a text based word processor.
edit
command-line Edit: Command Prompt is the correct name.
run as
type REFCLOSE at the command line
PKZIP
change directory
ipconfig
HFNetChk
chkcd
C: HFNetChk
Use the command dnscmd.exe
dcpromo.exe command line tool :source 70-640 windows server 2008 book pg.25