Restrict floppy access to locally logged-on user only
Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options
Determines whether removable floppy media is accessible to both local and remote users simultaneously.
If enabled, this policy allows only the interactively logged-on user to access removable floppy media. If no one is logged on interactively, the floppy media may be shared over the network.
If this policy is disabled, then the local user and remote users can access the floppy media simultaneously.