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LWE10349 : Disable MS DOS (16 Bit) Subsystem in Windows

Symptom:

DOS and 16 Bit applications are not needed any more

Cause:

16 Bit applications can be a risc to stability and security of the operating system

Solution:

In local policies or through Group Policy (GPO) the 16 Bit Subsystem can be disabled. Open Policy with Group Policy Editor (gpedit.msc), navigate to

"Computer Configuration/Administrative Templates/Windows Components/Application Compatibility" and set "prevent access to 16 bit applications" to ACTIVE

This should disable the so called NTVDM (NT virtual Dos Machine), the 16 Bit Subsystem. 

Note:
This does not generally disable a "DOS Box" as a commandline shell, as long as it's the (32-Bit) CMD.EXE.


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