When an W9x SBS client issues a NET VIEW \\ComputerName to view the SBS shares, they receive the subject message.
This doesn't happen on a Windows NT client.
SBS creates a default share named Administrator and W9x can only handle 12 character share names.
Rename the SBS share on %SystemDrive%\Users Shared Folders\Administrator from Administrator to Admins or ForAdminOnly
or BuyNTWkstn or ...