After going on another company and creating a MS-DOS Startup Diskette, I’m left with a screen “A:\>”. What does that mean? Or what should I do? Her running system is Millennium.

the ?A:\>? is simply the command prompt you see when booting from a floppy disk.
"A" represents the drive letter assigned to the floppy disk drive.

Once this prompt shows up the system is ready to accept commands, like

dir
format
fdisk
etc.

What have you created a startup disk for Goodhopeservices? What were you trying to do?

Hold on a minute - this appears to be a duplicate thread. Can a moderator delete this thread please?