ID: q104017
Under Windows NT, if you use the DEL /P command on an NTFS partition, it uses the eight-character filename, three character extension (8.3) convention instead of long filenames when prompting for confirmation.
Microsoft has confirmed this to be a problem in Windows NT version 3.1 and Windows NT Advanced Server version 3.1. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.
1. Open a Windows NT command prompt (CMD.EXE) from the Main group and
   enter the following command:
      copy con abcdefghi.xxx
   Type "this is a test" (without the quotation marks), press ENTER,
   type "^Z" (without the quotation marks), and press ENTER again.
   When you are prompted for confirmation, the filename is in 8.3 format
   as follows:
      ABCDEF~1.XXX, Delete (Y/N)? y
Keywords          : kbtool
Version           : 3.1
Platform          : WINDOWSLast Reviewed: August 14, 1998