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Windows Vista and later allow a new service PRESHUTDOWN notification. With normal SHUTDOWN notification, the service will be killed if it takes more than approximately 90 seconds to stop. When a service signals that it handles a PRESHUTDOWN notification, it will be given a greater amount of time to complete its shutdown. This can avoid a lengthy auto-recovery should the server have a large number of cache pages to flush at shutdown, such that it cannot complete under the SHUTDOWN limit. c-treeACE now enables handling of the PRESHUTDOWN notification on the selected Windows versions.
