Final answer:
To ensure each Windows computer receives a link-local unicast address upon starting, administrators can enable stateless address autoconfiguration (SLAAC), which allows computers to generate their own IPv6 addresses based on the network prefix received from a router advertisement message.
Step-by-step explanation:
In order to ensure that each Windows computer receives a link-local unicast address upon starting, administrators can enable the automatic configuration feature known as stateless address autoconfiguration (SLAAC).
SLAAC allows computers to generate their own IPv6 addresses based on the network prefix received from a router advertisement message. When a computer starts up, it sends out a router solicitation message to request the network prefix from the local router. The router responds with a router advertisement message containing the network prefix, and the computer generates its own link-local unicast address using that prefix.
This method eliminates the need for manual assignment of IPv6 addresses and ensures that each Windows computer on the network will have a unique link-local address.