The NTVDM CPU has encountered an illegal instruction
Question
When installing PDF XChange, almost at the very end of the installation I get the following error message:
16 bit MS-DOS Subsystem
C:\DOCUME…\User\LOCALS…1\Temp\….
The NTVDM CPU has encountered an illegal instruction.
CS:0546 IP:017f OP:65 2e 63 73 73 Choose ‘Close’ to terminate the application
[Close] [Ignore]
Answer
If you try to start or install an MS-DOS-based or a 16-bit Windows-based application on your Windows XP-based system, you may receive an error message that is similar to one of the following:
· 16-bit MS-DOS Subsystem path to the program that you are trying to start or install C:WinntSystem32config.nt The system file is not suitable for running MS-DOS and Microsoft Windows applications. Choose ‘Close’ to terminate the application.
· 16-bit MS-DOS Subsystem path to the program that you are trying to start or install config.nt The system file is not suitable for running MS-DOS and Microsoft Windows applications. Choose ‘Close’ to terminate the application.
· 16-bit MS-DOS Subsystem path to the program that you are trying to start or install C:WindowsSystem32Autoexec.nt The system file is not suitable for running MS-DOS and Microsoft Windows applications. Choose ‘Close’ to terminate the application.
Solution
Download and install the following fix before installing PDF XChange Pro