Hello: you can give the following procedure a spin
1) Windows XP uses a virtual DOS machine (NTVDM) to emulate MS-DOS. The
NTVDM must be working in order for your MS-DOS programs to run.
To test the NTVDM subsystem
Click <Start/Run>.
In the Open box, type command.com, and then click OK.
If a Command Prompt window opens, your NTVDM subsystem works.
If a Command Prompt window doesn't open, there is a problem with the
NTVDM subsystem.
This file (ntvdm.exe) is provided with your WinXP distribution
CD, so, if corrupted (mostly by virus), you may extract it from
there, or reinstall Windows XP on top of itself.
2) in windows XP CD there is utility called QFixapp
just install it & it will identify any file that wouldn't open and
it will create a fix that should work especially if your getting an Error related to NTVDM.exe
3) you could also try Try the following it could help you out:
Select My Computer -> Properties -> Advanced -> Environment Variables -> User environment variable
Set TEMP and TMP to c:\temp
16 bit applications can't manage the spaces or long file
names, and will generate ntvdm errors, even if they are not
explicitly referencing the TEMP directory.
If the above won't work then check Microsoft:
http://support.microsoft.com/kb/314106
Finally:you should try a registry Repair for instance Regcure
http://www.regkleen.com/RegCure.php?apid=A100000R&apflag=1&gclid=CKfR64LRvaACFQ1N5QodkDj6UQ&v=1
& a Malware Scan For Instance Anti-Malware - Malwarebytes
http://www.malwarebytes.org/mbam.php
Good luck..
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