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July 19, 2002

Why do 16-bit programs no longer run on a Windows 2000 system after I install Service Pack 2 (SP2)?

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A. Win2K SP2 introduced a program compatibility feature in the Windows NT Virtual DOS Machine (ntvdm.exe) that can prevent some 16-bit applications from running. If you receive the following error message, your program is experiencing this known problem:

<Program> caused a General Protection Fault in module KRNL386.EXE at 0001:6382 
Choose close. <Program> will close.

To resolve the problem, perform the following steps:

  1. Start a registry editor (e.g., regedit.exe).
  2. Navigate to the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\AppCompatibility\NTVDM.EXE subkey, then press Delete.
  3. Click Yes to the confirmation.
  4. Restart the computer.

End of Article



Reader Comments
so how can the 16 bit programs access hardware directly without registry modification

laufinjackass October 19, 2003


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