SPF-PC1 DOS application started through the Windows ntvdm.exe does not operate correctly

Technical Articles ID: KB75366
Last Modified: 2022-09-12 19:28:35 Etc/GMT

File and Removable Media Protection (FRP) 5.x

SPF-PC1 (16-bit DOS application)
For FRP supported environments, see KB81149 - Supported platforms for File and Removable Media Protection.

The SPF-PC1 (16-bit DOS application) does not function correctly when the application runs under Windows and uses the ntvdm.exe application.

The number of files and folders displayed is incorrect when FRP is installed.

The DOS application can only function correctly and see its own files and folders after you remove FRP and restart the system.

DOS 16-bit applications are unsupported with FRP. For a support statement that covers 16-bit DOS applications, see KB75453 - Support for 16-bit DOS applications with File and Removable Media Protection.

Background information:

ntvdm.exe
NTVDM can run at startup. It is a Windows NT Virtual DOS Machine (NTVDM) to run 16-bit tasks on the 32-bit operating systems if software on a system needs a 16-bit DOS driver.
SPF-PC
A 16-bit DOS application based on the mainframe editor ISPF editor.

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