Please see this page for a discussion of how this works. There are now internal zip drives in approximately one in four PCs and these can be accessed remotely from any of the PCs. To do this open Network Neighbourhood then double-click the system name of any machine which has a drive. All systems have 1.44MB floppy disk drives. Although hard disks are not routinely erased any information on the local disk will be visible to all users.
Hard disks are also liable to be erased without warning when the machines are updated.
Virus checkers run at all times on the PCs. The message confirming a virus will not only be visible to the user but will also be sent to the PC administrator. Any files kept anywhere else on the NT systems are not secure and their safety cannot be guaranteed.