How to Reinstall NTVDM.exe

1. Insert your Windows installation CD in the appropriate drive.
2. Open the search feature by clicking 'Start' > 'Search.'
3. Specify the directory to search in by selecting your CD drive, which is 'D:' by default. Search for 'NTVDM.EX_,' 'NTVDMD.DL_' and 'EXPAND.EXE' on the disk.
4. Copy the three files to your hard drive. Click 'Start' and type 'cmd' into the 'Run' box. Click 'OK.'
5. Type 'expand ntvdm.ex_ ntvdm.exe' into the command prompt and press 'Enter.' Type 'expand ntvdmd.dl_ ntvdmd.dll' and press 'Enter.' Close the command prompt.
6. Copy the expanded files into the 'C:\Windows\System32' folder. If Windows prompts you to replace the current files, click 'Yes.'