Win95 truncated extensions support in Windows NT
Certain command file operations: dir, del, copy, and move may not operate as
expected. NT may be set to operate like Win95 on file name extensions. For
example "del *.htm" would delete .htm and .html extensions in Win9X and in NT if
its default behaviour has been changed to emulate Win9x behaviour.
Value: 0default NT behavior
Value: 1win95-like behavior