Error on startup NTVDM CPU encountered an illegal problem

[sparkly]

Hi I am trying solve an issue on a c700 notebook win vista home basic 32 bit system

Whenever the machine starts up it gives me the following error box:
16 bit MS-DOS subsystem
C:\PROGRA~2\mswd\mswd.exe
The NTVDM CPU has encountered and illegal instruction.
CS:1202 IP:0104 OP:63 46 60 6b 71 Choose 'Close' to terminate the application.

If I 'ignore' nothing happens and if I 'close' then the computer shuts itself down after 5 min.
I tried to do a system restore but that has not worked and now all the restore points have disappeared.

Also i run AVG Free 9.0

Any help would be greatly appreciated.

 

[richc46]

Welcome,
Possibly an SFC will correct any corruption.Run 3 times if errors are found
http://www.vistax64.com/tutorials/66978-system-files-sfc-command.html

Run a full updated anti virus scan
Download and run a full updated scan with malwarebytes.

 

[sparkly]

i can't run an sfc as the command prompt is not in the accessories list

 

[sparkly]

found it by typing in cmd

 

[richc46]

Be sure to run as administrator.

 

[sparkly]

ok I ran sfc once so far... it said it found corrupt files but was unable to fix some of them.

However there were none listed in the log

 

[richc46]

Check the log again, it shows all errors. Is it the CBS log?
http://www.vistax64.com/general-dis...-not-completing-successfully.html#post1239523

 

[sparkly]

After running the sfc I used the information on http://www.vistax64.com/tutorials/66978-system-files-sfc-command.html to look for how,to see only the SFC scan details in the CBS.LOG

The txt document it put on the desktop was empty.

How else can i view the log?

 

[richc46]

Check the log again, it shows all errors. Is it the CBS log?
http://www.vistax64.com/general-dis...-not-completing-successfully.html#post1239523

From my above post

 

[sparkly]

still couldn't get any info on the log but second scan came up with no integrity violations.
I am running a third scan now.

I have had to run these in safe mode. Will I also have to try running them again in normal mode?

Third scan has also come up clean

 

[richc46]

They should be run in normal mode

 

[sparkly]

Hi Richard,

After following all your instructions yesterday the NTVDM issue is solved however i now am having exceptionally slow internet and missing windows features too. My instinct after this many hours of working on it is to try a repair and if that fails to try reinstalling the os.

Do you have any other suggestions?

By the way your help was fantastic and i have added to your reputation

 

[richc46]

First TY for your kind generousity.

Here are some suggestions to determine the cause of the slow internet. It is a long article, which I read quickly. Some of the ideas are awesome. Take your time and try to find a solution.
http://windows.microsoft.com/en-US/windows-vista/Why-is-my-Internet-connection-so-slow

Some of the more salient ideas are checking for a virus using your anti virus and download and scan with malwarebytes, full scan and updated.

Try with clean boot, I dont think this was mentioned, but this may solve your problem
http://support.microsoft.com/kb/929135

Read the section about IE.


I would try a repair install and see it that helps after trying some of the above steps
http://www.vistax64.com/tutorials/88236-repair-install-vista.html?filter[11]=Performance Maintenance

What are the missing Windows features?

 

[ilikefree]

For further reference you can cut and paste the following into cmd to see the log.

notepad C:\windows\logs\cbs\cbs.log