unable to open command prompt

August 13, 2009 at 11:49:13
Specs: Windows XP 2002

I am unable open the command prompt from C:\WINDOWS\system32\cmd what is the reason and how to open that

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August 13, 2009 at 12:07:38
OK you can't open cmd.

Mind telling us HOW you are trying to open cmd?
Mind telling us WHAT happens when you try to open a cmd prompt?
Mind telling us WHEN this started happening?

This can also be a sign of virus infection. Are you running AV and have you updated/run it recently?

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August 13, 2009 at 12:13:44
Cmd.exe actually starts NTVDM.exe (the NT Virtual DOS Manager). Make sure that you have 'C:\windows\system32\ntvdm.exe'.

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August 13, 2009 at 12:45:26
Confusing cmd.exe with command.exe?

NTVDM is a 16bit subsystem to simulate a DOS environment. CMD is a 32bit app.

You will find if you run Task Manager and then launch CMD NTVDM does not show up. But if you run Command, NTVDM does show up as a process.

Though I can see where you were thinking command from the subject line but the content says cmd

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August 13, 2009 at 13:40:36
Thanks very much for the correction, wanderer! That's very interesting. I learned something new, and that makes it a good day!

I didn't know that XP has two DOSs. It's often said that XP doesn't have DOS at all. ;-)

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August 13, 2009 at 14:00:53
It has no MS-DOS par-se same as NT4/W2K/XP 32/Vista 32/W7 32.... The only MS-DOS in XP/Vista 32 is when one creates a MS-DOS Boot Floppy and this is based on the MS-DOS Sub-System of Windows Muillenium Edition.

COMMAND.COM is NTVDM which is a Virtual MS-DOS Manager (based on MS-DOS5)



CMD.EXE is the NT Command Prompt (NT stands for New Technology and was built on IBM OS/2 code in the 80's)

No MS-DOS going on here please can everyone stop calling it DOS it is NT COMMAND PROMPT.....

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August 13, 2009 at 14:16:31
They will stop calling it dos when they stop calling a DC the PDC :-)

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August 13, 2009 at 21:10:19
A rose by any other name ... :-)

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