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After you install some programs, one of the following error messages may appear when you attempt to run 16-bit programs:
16 bit MS-DOS Subsystem drive:\program path XXXX. An installable Virtual Device Driver failed DLL initialization. Choose 'Close' to terminate the application.
16 bit MS-DOS Subsystem drive:\program path SYSTEM\CurrentControlSet\Control\VirtualDeviceDrivers. VDD. Virtual Device Driver format in the registry is invalid. Choose 'Close' to terminate the application.
In some cases, clicking Ignore allows the program to run properly, but the error message continues to be displayed when you start 16-bit programs.
This behavior can occur if the following registry value has become corrupted:
This issue may occur after you install a 16-bit program, or a program that uses a 16-bit installation program, that is not Windows 2000 compliant.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows