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This behavior generally indicates that the Virtual DOS Machine (VDM) is corrupt. To fix the problem, rename the files in the following table, using a .old extension, and expand new ones from the Windows NT CD-ROM. Reapply your latest Service Pack.
| File Name | D e s c r i p t i o n |
| Autoexec.nt | |
| Config.nt | |
| Vdmredir.dll | MS-DOS redirector driver |
| Krnl386.exe | 16-bit kernel |
| User.exe | 16-bit subsystem file |
| Gdi.exe | 16-bit and 32-bit handles video calls |
| Wowexec.exe | Win16-bit subsystem |
| Ntvdm.exe | MS-DOS subsystem |
| Ntio.sys | I/O driver |
| Ntdos.sys | MS-DOS driver |
| Redir.exe | network redirector |
