A central server in a network stores, or has access to, data relating to software stored on computers in subnets of the network. The central server is able to designate a computer in each subnet as a wake-up master for that subnet. The wake up master maintains an awoken state and is able to issue a wakeup signal to any computer designated by the central server in the subnet. A computer in a subnet requesting software from another computer in the subnet, but unable to find it because the other computer may not be awake, issues a request to the central server. The central server identifies a computer in the subnet likely to have the software and causes the wake-up master of the subnet to wake up the identified computer so the requesting computer can communicate with, and download, the requested software from the identified computer.