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Old 04-11-2006, 11:03 PM   #1 (permalink)
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Default Help with CMD

WHen i try to get into CMD in windows I get the message C:\WINDOWS\System32\cmd.com THE NTVDM CPU has encountered an illegal instruction.
CS:b701 IP:ecf7 OP:ff fe ff ff -- Choose 'Close' to terminate the application.

I have no idea what to do about this but any help would be great.
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Old 04-12-2006, 08:04 AM   #2 (permalink)
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try typing Command in the Run box instead of CMD and see if that helps. Just a thought
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Old 04-12-2006, 09:16 AM   #3 (permalink)
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Hello,

Sounds like a virus to me...

Check to see if you can open your registry editor...go to Start > Run > Type regedit and enter...

What happens?


I'd also scan your system for viruses, and at the very least, download and run to help identify and log possible spyware and malware.

You can take the log file and publish it for analysis in the subforum in the Tech Forums - HijackThis Logs (analyze), 'Virus - Spyware Protection / Detection' forum.
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Old 04-12-2006, 09:23 AM   #4 (permalink)
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If it fails a windows repair of the MBR will fix it.
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Old 04-12-2006, 10:43 AM   #5 (permalink)
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It might be because you're calling the wrong program.

CMD is cmd.exe
COMMAND is command.com

Try opening the cmd program from the actual file and see if it works, it's located at c:\windows\system32\cmd.exe
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Old 04-12-2006, 11:07 AM   #6 (permalink)
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Default Re: Help with CMD

Quote:
Originally posted by royalk4
WHen i try to get into CMD in windows I get the message C:\WINDOWS\System32\cmd.com THE NTVDM CPU has encountered an illegal instruction.
CS:b701 IP:ecf7 OP:ff fe ff ff -- Choose 'Close' to terminate the application.

I have no idea what to do about this but any help would be great.
Hello,

If he were to run command.com, it still shouldn't generate an error such as this. It should just bring up a command line interface with the user's account directory as default.

And I've just noticed something. Royalk4 quoted the error message, with the file C:\WINDOWS\System32\cmd.com. The file cmd.com is not a system file. cmd.exe is.

Such fake .com files are linked to threats such as the Alcra and Alcan worms, as well as several others.
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Old 04-12-2006, 11:15 AM   #7 (permalink)
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to backup alvin's post
Code:
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\>cmd.com
'cmd.com' is not recognized as an internal or external command,
operable program or batch file.

C:\>dir /s cmd.com
 Volume in drive C has no label.
 Volume Serial Number is FC3F-37B9
File Not Found

C:\>
i say run malware scans stat!!!
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Old 04-12-2006, 11:42 AM   #8 (permalink)
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Ok so I made a log in the highjack this thread. and am currently running an AV scan. I use Avira AntiVir as my AV.
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Old 04-12-2006, 11:49 AM   #9 (permalink)
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Default Re:

...if you type regedit in Run does this same problem occur...?
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Old 04-12-2006, 01:36 PM   #10 (permalink)
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When you do a scan do it in safemode btw.
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