Re: NTVDM CPU ERROR MESSAGE
The error is related to 16bit application on your system. It looks something has caused incomplete removal of some associated file which generated the problem. Which antivirus you were using. Try to run system restore and then check back. If nothing works then you will need to run a repair setup of windows. I am sure that will be more than enough to fix the problem you are facing.
Re: NTVDM CPU ERROR MESSAGE
You will need to go in System32 folder which is located inside Windows Directory. You will need to replace command.com file from here. You can find the same file from some working pc. Just copy that and paste it here. The problem can be due to some antivirus which is causing the failure. The antivirus might have wiped out some internal system files.