I bought a new PC recently. I was trying to put a cobol program onto this PC. My PC is running Windows 2000 Professional Service Pack 3. I know this cobol program works, I have used it on another PC before. When I run the command, C:\Rmcobol\Runcobol.exe /regserver The following error screen pops up, The NTVDM CPU has encountered an illegal instruction CS:0769v IP:02d2 OP:ff ff 00 00 00 Choose ‘Close’ to terminate the application. There is a ‘Close’ and ‘Ignore’ button. If I choose ‘Close’ the command prompt window will quit immediately. If I choose ‘Ignore’, it brings up another 8 NTVDM CPU messages just with value changes in the description. I had to End Task the Command Window. I have looked up various search engines and Microsoft, I have found similar errors but nothing specific to my problem. Has anybody encountered problems like this with Cobol and Windows 2000?