Will,
From my standard post on
cmd.com that I have had for over a YEAR...
You have a trojan/virus/worm.
cmd.com is *NOT* an XP file.
cmd.exe and
command.com are legitimate Windows XP files.
You have a trojan/virus/worm. cmd.exe is not part of the 16 bit MS-DOS
Subsystem. autoexec.nt and config.nt have nothing to do with cmd.exe.
When you type cmd in the Start | Run box, XP finds
cmd.com instead of
cmd.exe. When a command is typed without an extension, XP looks for the
.com extension first before it looks for the .exe extension, if it finds
cmd.com, it will not even look for cmd.exe. Because XP finds
cmd.com XP
thinks that it needs autoexec.nt and config.nt to run
cmd.com.
cmd.com is *NOT* an XP file, it's added by a trojan/worm/virus.
If you were to type cmd.exe in the Start | Run box, cmd.exe might open if
the trojan/worm/virus hasn't rendered it useless.
UPDATE your antivirus software and run a complete scan.
UPDATE whatever anti-spyware applications that you have and run a full
system scan with each one.