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I am installing c++ in vista, it shows error ntvdm cpu illegal i

When i am installing Turbo c++ in vista operating system it is showing error ntvdm cpu is not working

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Posted on Mar 04, 2009

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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

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

2 Answers

16 bit error while using turbo c graphics...........


Try running Turbo C with administrative priviliges and running it as Windows XP SP2 if you have Vista. Seems to work for me.

Aug 04, 2009 | AMD Sempron LE-1300, 2.3 GHz...

1 Answer

The NTVDM CPU has encountered an illegal instruction.


Do you have an anti-virus program? If you are with Comcast, it is FREE to download McAfee...run your virus protection application and see if it hits on it....and then choose to quarantine, or remove...make sure you update you virus protection weekly, you never know what is out there!!

Jul 31, 2009 | Computers & Internet

2 Answers

16 -bit error on amd


may be over heating problem
open the pc side panel and clear the dust from pc and cpu fan

Jul 21, 2009 | Computers & Internet

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

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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