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.
The easiest is simply inserting the Windows XP CD into the CD drive and clicking start — Run and entering:
expand X:i386userinit.ex_ c:windowssystem32
expand X:i386autoexec.nt_ c:windowssystem32
Replace X: with your CD ROM drive letter.