hello everyone,

i have windows xp service pk 2, and have just noticed something peculiar to me anyway...there seem to be two DOS executable files in the folder
C:\windows\system32\ i have the following
cmd.exe <--created in 2001
command.com <--created 2004
ntvdm.exe <--created 2004

start>programs>accessories>command prompt will run the cmd.exe file
typing command.com in the run box or at the command prompt will open another window which when clicked on to display properties says IT IS ntvdm
now when attempting to close the command.com window the message
windows cannot end this program...is displayed so i must click end now to exit
i was led to believe that xp/2000 have a DOS emulator not true DOS so what is command.com doing there along with the associated ntvdm.exe file and how are they related to true 16 bit DOS can anybody explain this john