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NTVDM.exe had encounter a problem etc...

Hello,

I'm trying to run an old CD (I believe a 16-bit application) and got the above Windows error message.
I tried to change the buffers/files to 80 but it doesn't seem to help.

What should I do?
TIA!!

p.s OS is WinXP Pro, version 2002, SP1
[ Sys info: Windows NT 5.1 build: 2600 ]

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  • Givoni May 01, 2008

    Thanks Puppetx.



    Sorry I forgot mentioning I've done that as well with no success.



    Any other idea?

  • Anonymous Mar 14, 2009

    I try to play my Settlers 2 CD, which is a game from a while ago meaning 16-bit, and i get a meesage "The NTVDm has encountered an illegal instruction" or something. 
    I think i have played this game on this computer in the past so i dont understand what has changed, but something has, any ideas?

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Right click on the icon you use to launch the application, goto properties and select the compatibility tab. The options available here should help you run much older software.

Posted on May 01, 2008

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Ntvdm cpu encountered illegal operation Hi all! I just installed Maya 2010 from a torrent file and since then I got this famous error message. It's just appeears as three command prompts appearing at the...


If I am reading this right your issue is not the application but where you obtained the application. Maya 2010 is a modern design application and comes in 32 & 64 bit versions. It is not a 16 bit application.

When Windows encounters a legacy application it calls the NTVDM for the legacy application to run in.

The fact that the application is calling the NTVDM is highly suspicious. NTVDM is the NT Virtual Dos Machine, a way for legacy applications to run in NT environments.

NT environments are Windows NT 3.5, NT 4.0, Windows 2000 Professional, Windows XP (Home, Pro & Media Center Ed), Vista (all versions) and Windows 7.

Old (legacy) applications written for 16 bit date back to Windows 3.1 and include Windows 95, 98 and Millennium Edition.

I would obtain a copy of Maya 2010 from a reputable outlet instead of Bit Torrent as "warez" frequently contain malicious items that will infect and ruin your machine.

Feb 05, 2010 | Microsoft Windows XP Home Edition

1 Answer

I cannot able to run Borland Turbo C++ 3.0 As it displays the following error messages. 16 bit Ms- Dos subsystem Turbo C++ IDE The NTVDM CPU has encountered an illegal instruction. CS:0000 IP:0075 OP:f0 00...


If you are trying to run this 16 bit app on a 32 bit XP system, then errors will happen. Right click on the apps desktop icon and go to PROPERTIES and click.Then click on the compatibility tab. Here you change it to operate in the 98 Windows emulation. Save and start the app.
This will work if you are logged in as Adminstrator. If not you can go back to the instructions above and when the properties window opens click on the first ADVANCED button you see. There you make sure both the " log on as..." and seperate memory space" check boxes are ticked. Then save and it should now open in a seperate memory space just like the older systems that this program was made for.

Good Luck

Dec 18, 2009 | Microsoft Computers & Internet

1 Answer

NTVDM CPU fix


Hello there:
Something is amiss with your system.

That error message is associated with problems involving 16 bit
applications (Windows 3.x or MS-DOS) and both cmd.exe and regedit.exe
are full 32 bit Windows apps.

This sounds like it may be caused by an incomplete removal of one of
the trojans that blocks the use of Regedit.

You did not mention the specific products that you have tried. If you
have not previously used any of these you should try them:
Kaspersky Online Scanner http://www.kaspersky.com/virusscanner
Panda ActiveScan http://www.pandasoftware.com/activescan
Webroot http://www.webroot.com/
I highly recommend avg antivirus free version this is totally free and worked wonders for me
I hope that this is very helpful for you
best regards michael


Nov 16, 2009 | Dell Dimension 3100 PC Desktop

2 Answers

Turbo c not working....16 bit ms-dos subsystem error


There have been several changes in the way programs work. Windows xp does not
allow direct access to hardware resources to protect system integrity.
However you can try a few things

http://support.microsoft.com/kb/314106
http://support.microsoft.com/?id=165214
http://support.microsoft.com/?id=324767

Generaly speaking this error shows up when a program tries to use a
command.com file from an incompatible version of windows.

Alternatively login in safemode and use. it ll work fine. rate this!!

Aug 15, 2009 | Borland Turbo C++ 4.5 Full Version for PC

3 Answers

16 bit MS-Dos Subsystem Turbo C++ IDE The NTVDM CPU has encountered an illegal instruction cs:0000lp:flboop:of00640352 choose close to terminate the application


I too have a problem on my PC,when running the Turbo C programThe error message is:

16 bit MS Dos Sub system
turbo c++ IDE the NTVDM has encountered an illegal instruction.

At last i found the solution, and it is simple.
After installing your turboC follow the steps..
1) go to TC directory and open BIN.
2)In "BIN" folder you can find "tc.exe". Right click on "tc.exe" and click properties (and make sure that do not click on shortcut of TC.exe).
3)In properties there should be a tab called "screen", In that you will find "usage" option. There.. select "window" option instead of "full screen".
4) Then click "OK".
5) Now click "TC.exe".
6) It will open in window mode, if you want you can change full screen mode by pressing "ALT + Enter".

Thanks & Regards
Shravan reddy Konnela.

Jun 02, 2009 | Microsoft Windows XP Professional with...

1 Answer

16 bit MS DOS Subsystem error


I found a website of people who have the same problem;as you will see Microsoft does not have a fix for it. The recommended fix is to backup your data and reload Windows.
http://www.techspot.com/vb/all/windows/t-5039-NTVDM-CPU-illegal-instruction-.html

Pls rate this solution.

Apr 13, 2009 | Microsoft Windows XP Home Edition

1 Answer

Windows problem


Try this.
Right Click on your DOS program EXE file. Then go to properties and go to Compatibilty TAB. Click in Check Box for Compatibitlity mode and select WINDOWS 95.

Feb 10, 2009 | Computers & Internet

1 Answer

When i am trying to use c++ on my system it is giving me message the NTVDM cpu has encountered an illegal operation


Here is an explanation of what NTVDM is: The NT Virtual DOS Machine (a.k.a WOW, or Windows on Windows), is a Win16 subsystem that runs under Windows NT, which allows 16-bit applications to run as if they were being executed on a DOS machine, with that machine's multitasking and segmented memory model. Because the system is multitasked 16-bit DOS and Windows applications cannot crash NT. However, 16-bit apps within a Win16 subsystem run the exact same way as they do on a DOS/Win 3.x machine; therefore, 16-bit apps within the subsystem can crash one another, or the subsystem. To prevent this, you can launch multiple WOW subsystems as long as your program does not communicate using shared memory. Windows NT will not allow NTVDM to execute instructions that try to directly manipulate hardware or memory locations. As a result, some DOS and Windows 3.x applications (such as games) may not run under Windows NT.

Feb 02, 2009 | Computers & Internet

1 Answer

The ntvdm cpu has encountered an illegal instruction


I took this from another web site:
Michael Chiew said:
What did you do before this happened? What were your last deeds on the machine before the pop-up appeared?

I think what you're referring to is NTVDM CPU, not NTDVM CPU. Am I correct?

What do you know about 16-bit and 32-bit applications? Well, 16-bit applications are those that must work within the DOS (Disk Operating System) environment, a real-mode arena. NTVDM stands for NT Virtual Dos Machine.

In Windows XP, as in Windows 2000, or Windows 98, there are 16-bit and 32-bit environments (real mode and protected mode respectively).

Windows XP can only operate in 32-bit mode. All 16-bit applications must work within its own theatre of operation, typically, the first MB of physical memory (ram). Conversely, 32-bit applications must function above the first MB memory line. If either of these applications happens to slip into "alien" territory, you get an error message like "something" has encounter an illegal instruction. In other words, the wayward application is trying to slip by the immigration checkpoint.

In your case, updatemgr.exe (I suspect updatemgr.exe is a 32-bit application) has in all likelihood wondered into the 16-bit arena. Hence, NTVDM CPU issues that warning. 

Why do you continue to get the message. It's because updatemgr.exe incessantly misbehaves itself on start-up, always trying to load itself into a particular memory address where it is not welcome. Why the persistence? Updatemgr.exe has gone bonkers. It is either corrupted or damaged.

On the other hand, one cannot discount the possibility that NTVDM (NTVDM.EXE) is corrupted or damaged. So your problem lies with either updatemgr.exe or NTVDM.EXE, or both.

There are 2 things you could do.

First, establish who owns updatemgr.exe, Microsoft or some third-party owner. Second, rename updatemgr.exe and see whether the message goes away.

To establish ownership (and the function of updatemgr.exe), do a search for the file. 

Click START, select FIND. In the FIND dialog box, type: updatemgr.exe. See the directory in which the file has lodged. In Windows Explorer, get to the file, right-click on it, select PROPERTIES. Who owns it? Is there an indication of its function.

Next, rename the file. Right-click it, select RENAME and rename it to, say, updatemgr.old. RESTART your computer. Do you still get the error message. Not likely.

To clean things up a bit, perhaps it is a good idea for you to replace the current NTVDM.EXE with a new copy. Find out where NTVDM.EXE is. Then, click START, select RUN. Type in the RUN dialog box SFC to run the System File Checker. Insert your OS CD, follow the prompts, extract a copy of NTVDM.EXE and send it to its place of residence. Of course, you should also replace a copy of updatemgr.exe.

That should eliminate your problem for good.


Dec 25, 2008 | Microsoft Windows XP Home Edition

2 Answers

VISTA:The NTVDM CPU has encountered an illegal instruction


The link below is a step-by-step troubleshooter from the Microsoft website. You'll just need to follow all the instructions on the site and you should be able to fix it all by yourself. This seems to be a common error with windows.

Troubleshooting NTVDM and WOW Startup Errors

Sep 10, 2008 | Computers & Internet

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