Under Windows NT, use the command line, NT Explorer, or File Manager to format a 3.5" disk. A Windows 95- or DOS-formatted disk will not work as an NT boot disk. Copy the following files from your hard disk to your 3.5" disk: ntldr, ntdetect.com, boot.ini, bootsect.dos, and ntbootdd.sys (if it exists on your system). These files are typically hidden, so you must change their attributes or turn on the option to show hidden files. After you build the boot disk, try it to ensure that it works.