XP-Pro SP2 cannot run command.com

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I have a customer who has xp-pro sp2 (32 bit) fully updated (same as my
main machine) and when she runs command.com she gets the message
"Windows cannot find command.com. Please bla..bla.bla" The same with
any other dos program. In the system32 folder, dir finds command.com
and config.nt but not autoexec.nt. I had her restore those three files
from a program that repairs the 16-bit sub-system error of a year or so
back. All it does is extract those three files from a self extracting
winzip file.

After restoring those files, the error is identical -- "windows cannot
find ...".

I've verified that no software restriction policies are set and had her
turn off her anti-spyware program and no change. She's using mcafee av
which I personally don't like but have never heard of it causing such a
restriction.

Any idea of what else to check would be greatly appreciated. I had
forgotten about the Malicious Program Removal tool until I noticed a
mention of it in this group. Should I have her run that?

--

.



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