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The Service Control Manager (SCM) is responsible for handling the startup and stopping of services. The SCM starts a service by launching the service-application, and then expects to receive a started-message from the service within a certain timeout.

Set this REG-SZ key in the registry to specify the timeout in milliseconds:

[HKEY_LOCAL_MACHINE \System \CurrentControlSet \Control]
ServicesPipeTimeout = "30000"

More Info MS KB Q824344
More Info MS KB Q884495

The SCM stops a service by sending a stop-message to the service and then expects to receive a stopped-message from the service within a certain timeout. Set this REG-SZ key in the registry to specify the timeout in milliseconds:

[HKEY_LOCAL_MACHINE \System \CurrentControlSet \Control]
WaitToKillServiceTimeout = "20000"

More Info MS KB Q146092
More Info MS KB Q839262

Note if lowering the value too much it might cause improper shutdown of some services, which might lead to half-written / invalid / faulty data that will keep the service from starting properly again.

Note if having an UPS make sure it can supply enough power to support the shutdown of the machine properly, if increasing the value.

Related Control Application Timeout