Error: Unable to Run MASM in 16-bit mode, PLEASE help

[omdown]

I'm having a bit of trouble here, I'm doing a bit of programming in 16-bit mode, and when I click Build 16-bit MASM it runs fine, but when I hit Run MASM, it gives me this error messge:

C:\WINDOWS\System32\cmd.exe
C:\WINDOWS\System32\Autoexec.nt

The system file is not suitable for running DOS and Microsoft Windows Applications.  Choose "close" to terminate the application.

The window has "Close" and "Ignore" buttons, but they both do the same thing.  The program doesn't run, just says "Press any key to continue  .  .  .", and of course on pressing a key it closes.

Does anyone know what I can do to fix this?

[AeroASM]

This is a bug in XP SP2, I think. Search on the Microsoft Knowledge base for "autoexec.nt"