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How to deal with NTVDM (Virtual DOS Machine)
Author: Craig "hachiroku" Mercer
Date Created:2002-01-15
Operating System(s):Windows Logo imageWindows NT 4.0

NTVDM is the module that creates the VDM for 16 bit applications to run in. If you don't want it hanging around wasting precious RAM you can get rid of it by switching the value of DefaultSeparateVDM at:

HKEY_LOCAL_MACHINE\SYSTEM\CURRENTCONTROLSET\CONTROL\WOW
to "yes". This will prevent ntvdm.exe from starting up. If it should be needed by a 16 bit application it is loaded and after the application is closed out it goes away too. The only downside to this is that 16 bit apps take a little longer to load.

The Usual Disclaimer: Modifying the registry can cause serious problems that may require you to reinstall your operating system. Use the information provided at your own risk.